Showing posts with label autumn. Show all posts
Showing posts with label autumn. Show all posts

Saturday, May 11, 2013

Shagbark Hickory

emerging hickory leaves can sometimes resemble praying hands
 © Dave Spier

A week of warm weather has created a green paradise in the northern Finger Lakes region of New York. Among the many transformed deciduous trees, the Shagbark Hickory (Carya ovata) leaves have emerged. When the giant bud scales first peeled open, the "fingers" of miniature leaves resembled "praying hands." Once fully opened, the hickory's feather-compound leaves become distinctive. There are five (sometimes seven) leaflets with four opposite and one at the tip. The smallest are the inner, the middle pair are larger and the terminal leaflet is the largest. All are toothed and long-pointed. By the time it's done growing, a compound leaf can reach over a foot in length.

young hickory leaves unfolded and growing


hickory flowers are wind pollinated

Shagbarks, aptly named for the long, peeling shreds of bark, can easily grow to a height of 60 to 90 feet. The record is 120 feet. The wood is strong and elastic and was once prized for tool handles, gunstocks, skis and chair backs. When burned, it gives off a lot of heat and makes high-grade charcoal.

Shagbark Hickory bark
In late summer and early fall, the thick-walled nut husks split into four sections and release the four-ridged nuts which are good to eat. (Squirrels, possums, Wild Turkeys and Wood Ducks would agree.) The nuts also can be ground in a meal-like flour or crushed and boiled to separate the oil. Rabbits and deer browse the twigs. In late winter, the trunks can be tapped in the manner of collecting maple sap.

child holding hickory nuts, some with the husk on (Bayberry Environmental Education Center, Junius, NY, when I was a naturalist there)

Hickories are related to walnuts and butternuts (Juglans spp.) which have numerous leaflets, all roughly the same size. All these trees are in the same family (Juglandaceae) along with pecans.


Corrections, comments and questions are always welcome at northeastnaturalist@yahoo.com or connect through my Facebook page and photo page. There's also a community-type page for The Northeast Naturalist. Other nature and geology topics can be found on the parallel blogs Adirondack Naturalist and Heading Out.

Tuesday, November 13, 2012

Golden-crowned Kinglet


© Dave Spier

Okay, it's a lousy photo. Normally I would delete it and go on, but it brings up an interesting point about birding. I was walking the trail beside the Canandaigua Outlet in Three Mills Park northwest of Phelps, NY. The weather was overcast and birds in the tree tops were mere silhouettes at best. A small, nervous bird, constantly on the move, caught my attention. It acted like a kinglet, and I might have passed it off as a Ruby-crowned, the expected species (although I'd use "kinglet sp." for eBird, or maybe "passerine sp." because I wasn't even sure it was a kinglet). I managed a few shots with the flash on, but most were basically under-the-rear-end views, not much help in ID'ing. I did get lucky with what turned out to be a side view and an out-of-focus or blurred head/front shot, although I didn't realize it until I was leaving the park and bumped into another birder. We looked at the photos and voila, a Golden-crowned Kinglet (Regulus satrapa), the first for this park according to the eBird bar chart.

I always carry a camera, except maybe in the yard when I'm doing other things. It's not my biggest lens, but something manageable (a 300mm + 1.4x), and it's mounted on a gunstock with a strap so I can carry it on my shoulder and whip it into position at a moment's notice. I now make a habit of keeping an external flash on the camera, even though it makes it more difficult to use if I'm wearing a hat (usually a baseball-style camo cap). A small, compact point-and-shoot camera with a long zoom might be a better solution, but I don't have one. Besides, my light-weight T2i (DSLR) is highly responsive and, when I do things right, gives sharp, low-noise photos.


Kinglets are tiny gray birds with olive-green touches and a lighter belly. The golden-crown is named for a yellow streak outlined in black on the top of the head. This is accented with a white stripe above the eye and bill. The similar Ruby-crowned Kinglet (Regulus calendula) has a gray head, white eye-ring and under the best of conditions, a red patch on the crown of the male. Learn more on the All About Birds website which has photos, voice recordings and a range map. There's also a range map on eBird, but there are gaps in the Canadian coverage due to fewer birders.

The Golden-crowned Kinglet was unexpected because it prefers conifers, and there are none in the park. Its breeding range spans the Canadian boreal forest all the way to the Rockies and the Pacific. There's a year-round range down the west coast and an eastern year-round range from the Canadian Maritimes down through the Appalachians. Most of the continental U.S. is potential winter range. I have seen this species in deciduous trees, but usually there are conifers within sight. (This was also the case in our yard, where we have a mix of both deciduous and "evergreens," on the one occasion that a golden-crowned stopped on its way through.)

female Ruby-crowned Kinglet (October, in our yard) for comparison

Three Mills is a small Ontario County park, not much more than a few acres of wooded floodplain along a major creek in the northern Finger Lakes region of New York. However, for its relatively small size, it's a gem with a variety of good bird habitats. It was donated by the Ontario County Federation of Sportsman's Clubs and mainly provides fishing access - until more birders discover it. The flowing creek stays open during the winter and attracts waterfowl, including Common Mergansers. I also drive the nearby roads, particularly Falkey Road along the south bank of the creek. The fields just to the south and along Stryker Road sometimes have Snow Buntings in the winter.

Corrections, comments and questions are always welcome at northeastnaturalist@yahoo.com or connect on Facebook (two pages for Dave Spier, personal and photo, and The Northeast Naturalist).

Thursday, November 8, 2012

Evening Grosbeaks



© Dave Spier

Natural food shortages (of the bird kind) are encouraging Canadian finches to head south for the winter. One of the most colorful is the Evening Grosbeak (Coccothraustes vespertinus), somewhat resembling a giant goldfinch, which is not too far off, since they are related. Goldfinches are five inches long (slightly shorter than a chickadee), whereas these grosbeaks are eight inches.

The male Evening Grosbeak [photo above] is very noticeable with white patches contrasting against otherwise black wings and short, black tail. His body is burnt-gold (yellow) grading to a dark-brown head with yellow forehead and wavy line above the eye. Females [below right] are subdued, with mostly gray on the body and head. The only yellow is confined to her neck. Both sexes have massive, pale-colored bills.

Grosbeaks eat mainly seeds, nuts, berries and buds, and they readily come to feeders (if they're around). We had eight Evening Grosbeaks for several days right after Hurricane Sandy and then they vanished in their nomadic fashion. Three returned briefly and a week later, there were four down the road. Unpredictable is a good way to describe this bird.

As always, you can find photos, range map and voice recordings on the All About Birds website. In addition, find current range information on the eBird Range-and-Point-Maps under Explore Data. Use the search boxes to see a range map for this (or any) species you type and then zoom in to your location. You can narrow the date span with the "Custom Date Range" tool or look for any possible sightings in your area by using the Location tool. Write to me for specific information and links. I also encourage you to submit your own sightings. This is how I keep track of their wanderings in my neighborhood, and the information benefits science.

Corrections, comments and questions are always welcome at northeastnaturalist@yahoo.com or connect on Facebook (Dave Spier, or my photographic naturalist page, plus The Northeast Naturalist).

There's more information from the ABA regarding Evening Grosbeaks and the connection to spruce budworm in their breeding range [mainly the Canadian boreal forest].

Wednesday, October 31, 2012

Witch-hazel



Witch-hazel
© Dave Spier

Sounds like a Halloween shrub, but this "witch" comes from Middle English wiche (from Old English wice) meaning "bendable" and was applied to the Wych Elm. Colonists, not being botanists, transferred the name to the American shrub because the branches were used as divining rods, also called "witching sticks" (to find underground water or precious metals) in the fashion of flexible elm and hazel twigs in England. American Witch-hazel (Hamamelis virginiana) is superficially similar to hazel, especially the leaves.

Witch-hazel is unusual in that it blossoms in the fall. It's yellow flowers with straggly petals are hidden until the wavy-edged, golden leaves drop. The flowers may persist into winter, giving the shrub the nickname "winterbloom." 

At the same time as flowers appear, last year's fruits are maturing. The oily seed interiors are edible and supposedly taste like pistachios. Warm weather will cause the capsules to "explode," a neat trick of nature to disperse the seeds away from the parent's shade. The same thing will happen if you bring the twigs inside.
Witch-hazel long has been used as an external astringent to treat sores, acne, hemorrhoids, insect bites and poison ivy among other things. The Iroquois made a strong tea to treat dysentery, coughs and colds. The bark contains the highst concentration of hamamelitannin, one of the active ingredients. Proanthocyandin extracts have anti-viral properties and reduce inflammation. [Do not try this at home without researching the details, or consult with your doctor.]

Corrections, comments and questions are always welcome at northeastnaturalist@yahoo.com or connect on my two Facebook pages. There is now a community page for The Northeast Naturalist. [links below]

Sunday, September 16, 2012

Bur-marigolds

Bur-marigolds at the Montezuma Audubon Center, Savannah, NY, in September

Check your local damp meadows and marsh edges for a golden haze of beautiful, yellow, native wildflowers called bur-marigolds (Bidens species). Resembling small sunflowers, the bright-yellow flowers have an average of eight rays around a central disk. Not surprisingly both the sunflower and bur-marigold are in the Aster (or Composite) family.

Two species may occur in New York. The Showy, or Larger, Bur-marigold (B. laevis) has rays longer than a half inch and flower heads up to two inches in diameter. This species is found mainly from California across the lower (southern) states, and locally into the Midwest and also New York along the Lake Ontario plain. Apparently it's also widespread along the East Coast to Massachusetts.  A second species, Nodding Bur-marigold (Bidens cernua) has smaller yellow flowers that nod as they ripen.  It is widespread across Canada and the continental states except the Southeast and it's the more-likely species in New York, especially the Finger Lakes Region. Both species have opposite leaves that are narrow, long-pointed and toothed along the margins. The leaves of B. cernua are sessile (stalkless) and hug the often-rough stems.  B. laevis is smooth-stemmed with leaves that narrow (taper) at the base. The Finger Lakes Native Plant Society has an excellent species profile on their website.

Bur-marigolds also are known as beggar-ticks and stick-tights, referring to the sharply three-pronged seeds [achenes] that stick to clothes as you brush by a ripe plant.  The numerous seeds are eaten by upland and aquatic birds.

Additional reference:
Newcomb's Wildflower Guide, by Lawrence Newcomb and Gordon Morrison (© 1977), published by Little, Brown & Co.

Corrections, comments and questions are always welcome at northeastnaturalist@yahoo.com or you can connect through my Facebook page at Dave Spier (photographic naturalist) or my personal page, Dave Spier with the profile photo of me birding through a spotting scope. There's a new Fb page for The Northeast Naturalist.

Wednesday, September 12, 2012

Marsh Wrens



As a group, wrens are small, noisy, brown birds that often hold their short tails upright.  Their bills are thin and curve down to a point for picking and eating insects and spiders.  The House Wren is the most familiar; it is plain brown and nests in tree cavities or nest boxes, often in proximity to human dwellings.

Its cousin, the Marsh Wren (Cistothorus palustris) lives – where else – in cattail marshes.  Its gurgling, rattling trill can be heard any time of day or night.  (If you think you might have heard this wren, you can listen to a recording of its song on the All About Birds website.)  On rare occasions when it perches on a cattail top in the open, you’ll notice a dark cap and light line above the eye.

During breeding season, nests are lashed to vegetation and sometimes hidden in shrubs.  Construction includes a woven dome of grasses and sedges with the entrance on side.

The Marsh Wren population is declining in the east, but increasing in the west.  Major differences in the two subspecies’ songs may indicate two separate species.  The combined winter range extends along the Gulf coast into the Southwest and down through all of Mexico.  A year-round population hugs the east coast from the Mason-Dixon line [the Pennsylvania/Maryland border] south to Florida. During migration, a Marsh Wren can stop in any of the lower 48 states.

The Marsh Wren photo was taken September 3rd from the dike separating the two main impoundments at the Montezuma Audubon Center north of Savannah, New York, where they can be heard, and sometimes seen, throughout the late spring, summer and early fall. You can get an idea of their seasonal distribution (and all the other species) in the Wetlands Complex by looking at the eBird bar chart for Wayne and Seneca Counties, New York.

On Saturday, September 29, there will be an organized canoe trip in the Montezuma Wetlands Complex from 2 pm – 4:30 pm.  Join the Montezuma Audubon Center’s Teacher-Naturalist, Frank Morehouse to explore the Seneca River along Howland’s Island, New York.   Learn about the birds and other wildlife of the area on a leisurely paddle.   There is a fee; canoes, paddles and life jackets will be provided (and binoculars if needed).   Bring water and snacks.   Pre-registration is required by calling (315) 365-3588 or email montezuma@audubon.org for details. The MAC website is http://ny.audubon.org/montezuma

Canoeing the Seneca River around Howland's Island, New York (file photo taken July 9th)  - © Dave Spier

Corrections, comments, questions and suggestions are always welcome at northeastnaturalist@yahoo.com  and on Facebook and The Northeast Naturalist.

Saturday, September 8, 2012

M.A.R.S.H.


M.A.R.S.H. --© Dave Spier

MARSH stands for the Montezuma Alliance for the Restoration of Species and Habitats, a group of volunteers that does everything from removing invasive species to planting new trees.  The next events, scheduled for September 12th, 15th and 22nd from 9 am to 1 pm, will be devoted to collecting ripe seeds from a variety of wetland plants including Arrowhead (a.k.a. "duck potato"), Pickerelweed and Bur-reed.  These species, along with bulrushes and cattails, create a habitat called an emergent marsh.

The seeds will be collected at the Seneca Meadows Wetland Preserve on Black Brook Road, which runs south from Rt. 318 (east of the four corners at Magee) and ends in Seneca Falls, New York. After drying, the seeds will be used to restore habitats on the Northern Montezuma Wildlife Management Area in the Town of Savannah, Wayne County, NY.  The MARSH volunteers are sponsored by the Friends of the Montezuma Wetlands Complex. To sign up, click their website link. BTW, lunch is provided.

The Seneca Meadows website includes a drop-down menu with a description of the trails and a PDF map link.  The I Love the Finger Lakes website has an excellent profile of both the wetlands preserve and the education center.

Corrections, comments and questions are always welcome at northeastnaturalist@yahoo.com or connect through my Facebook nature page and photo page. Other nature and geology topics can be found on the parallel blogs Adirondack Naturalist and Heading Out.

Thursday, September 6, 2012

Least "Mudpiper"

Least Sandpiper (Calidris minutilla) at Montezuma N.W.R., NY on May 13 - © Dave Spier (#D045935)

What's in a name? Take the compound word "sandpiper." Sand refers to the beach where these shorebirds are often found. The Lake Ontario shoreline of New York quickly comes to mind. Piper refers to the sound made by some species, although it's more of a peep. There's a group of small sandpipers, all similar in appearance, collectively nicknamed "peeps," in reference to their voices. Among these, the smallest is the Least Sandpiper, Calidris minutilla. Not only is it the smallest to pass through New York, it is the smallest shorebird in the world.

Least Sandpipers begin showing up in New York's Finger Lakes Region in April, peak through May, then decline in June and early July as the last of the birds fly to the Canadian tundra to nest and breed. Early migrants that failed to nest begin returning in early July and this reverse flow continues to build through the summer, peaks in September and trails off to end abruptly before November. The eBird bar chart for Wayne and Seneca Counties (NY) will illustrate this - but you can create a chart for any state or county you choose.


Least Sandpiper (Calidris minutilla) at Montezuma N.W.R., NY on May 18 - © Dave Spier (#D029504)

Most of our eastern birds seem to winter along the Atlantic coast from North Carolina to Florida, or across the Gulf coast south into Mexico and northern South America.  You can see the entire eBird range map for Least Sandpipers (or any species) on the Explore Data page.

Dark feathers with buffy or rusty edges give sandpipers a scaly appearance on the back and wings. The belly is usually white while the head, neck and chest are various shades of brown. The black bill, used to probe for food, is longer and thinner than the bills of songbirds. Most small sandpipers have black legs, but here is the one distinguishing feature of least's; their legs are yellowish or greenish-yellow.


Least "mudpiper" at Montezuma N.W.R., NY on May 18 - © Dave Spier (#D029488)

The length of a shorebird's bill determines its feeding style and diet. A very short bill, like that of a Semipalmated Plover, limits it to feeding on the surface. At the other extreme, very long bills like those of snipe, dowitchers and curlews, allow them to probe deeply into mud. Inbetween are most of the sandpipers which probe to a shallow depth and capture aquatic invertebrates like insects, small crustaceans, worms, and mollusks such as small clams and mussels. The Least Sandpiper prefers to feed on mudflats giving it the nickname "mud peep." Does that mean we should change its name to the least mudpiper?

Corrections, comments and questions are always welcome at northeastnaturalist@yahoo.com or connect through my Facebook page or photo page or Linked-in. Other nature and geology topics can be found on the parallel blogs Adirondack Naturalist and Heading Out.  For more information on the Finger Lakes region, visit ILovetheFingerLakes.com

The photo below is a migrating Least Sandpiper on the Lake Onatrio shore at Charlotte Beach (a.k.a. Ontario Beach Park), Rochester, NY on September 18 - © Dave Spier (#1148-13 scanned from a slide)

Thursday, August 23, 2012

Bald-faced Hornets

This is an insect you want to know in order to avoid it.  When they're out collecting food, I can get fairly close without upsetting them, and by moving in slowly I've gotten some decent macro shots of hornets scraping the pulp of fallen pears on the ground.  Fruit juice seems to be a favorite food of adults.

Bald-faced Hornets (Vespula maculata) are related to Yellowjackets, Paper Wasps and Potter Wasps in the family Vespidae.  At a more general scale, they are in the order Hymenoptera with bees, ants, ichneumons and other wasps.  Hornets are large and black with white markings on the face, body [thorax] and tip of the tail [abdomen].  


Only the queens overwinter.  In the spring each survivor starts a small nest with one layer of cells an inch or two in diameter.  As the new workers emerge, they take over nest building and add larger tiers [layers of cells] underneath, then cover these with an outer, gray, paper-like material made from wood pulp.  The round-topped nest usually hangs from a branch, but I've also found them close to the ground in bushes.  In fact there's one next to the trail around my property and I've had to flag and "close" that section so the grandkids don't use it.  As the nest expands, it tapers toward the bottom where the entrance/exit hole is located.  Hornets are most dangerous when you are close to their nest. Unlike bees, hornets can sting repeatedly.
 
 
 
In late summer, the males emerge to mate with future queens.  As temperatures dip well below freezing in the fall, the males die along with the female workers and old queens and any immature larvae still in the nest.  Young queens spend the winter underground or in deep leaf litter.

Corrections, comments and questions are always welcome at northeastnaturalist@yahoo.com  Also you can connect through my Facebook photo page at Dave Spier (photographic naturalist) or my personal page, Dave Spier (northeast naturalist).

Saturday, November 26, 2011

Letchworth Park (cont'd) -- © Dave & Donna Spier

Railroad bridge 234’ above the river at Upper Falls -- © Donna Mason-Spier

Train on railroad bridge 234’ above the river at Upper Falls -- © Donna Mason-Spier

[Part 1 of this article is the previous post directly below this one.]
Roughly 350 million years ago [during the Devonian period, named for Devon, England where rocks of this age were first studied], western New York was still submerged under an inland sea near the equator. Sediments washing down from the Acadian Mountains to the east continued to fill the basin with layer upon layer of deposits that solidified into a thick sequence of shales, siltstones and sandstones now partially exposed in the Letchworth gorge. [For comparison, older rocks deeper in the Catskill Delta are exposed at Taughannock Falls State Park, profiled in an earlier blog (see October 27). The Tully limestone at the base of the Taughannock gorge formed as a shallow reef near the edge of the inland sea between Middle and Upper Devonian time.]

Rainbow in the mist below Upper Falls -- © Donna Mason-Spier
After exploring the Upper and Middle Falls, we drove north and briefly stopped at the Archery Field Overlook next to Great Bend canyon. Sometimes there are Turkey Vultures from the resident flock working the air currents, but today we didn't see a single one.

Great Bend canyon south from Archery Field overlook-- © Donna Mason-Spier

Great Bend canyon north from Archery Field overlook-- © Donna Mason-Spier
Our final stop of the day at Letchworth was Wolf Creek and a walk out to the point. Steep cliffs drop to the river below. A short spur trail to the south leads to a Red Pine barely clinging to the dry rim. Erosion has left the inner roots exposed at the base of the trunk.  In the park, Red Pine is at the northern limit of its range.

Red Pine on the rim near Wolf Creek -- © Donna Mason-Spier
Donna had predicted a nice sunset and sure enough we got one, although we had to detour to find an open view to the west-southwest.  After taking a few shots, we found a wet corner of the field with a nice reflection as the color began to fade.

Sunset from Freshour Rd. near Shortsville -- © Donna Mason-Spier

Letchworth Thanksgiving -- © Dave & Donna Spier

Trees on the canyon rim at Letchworth State Park, NY_© Donna Mason-Spier

This year’s Thanksgiving weather was pretty decent by western New York standards.  In fact, it's been the fifth warmest November on record.  Where we were, the weather didn’t live up to predictions, but we did get some sunny breaks in the afternoon between the morning cumulus clouds (probably coming off Lake Erie) and the evening cirrus coming in from the west that gave us a beautiful sunset to end the day.

Donna and I renewed our tradition of spending Thanksgiving in Letchworth State Park about midway between Rochester, NY and the Pennsylvania state line. After entering the park at the Mt. Morris [north] end, we drove the roughly 15 miles to the waterfalls near the south end. First stop was Inspiration Point which has heated restrooms open year round. There is a handicap-accessible interpretive trail along part of the rim and starting from the parking lot.

View from Inspiration Point -- © Donna Mason-Spier

At the end of the last Ice Age, glacial fill [clay, silt, sand and gravel that's part of the Valley Heads Moraine] blocked the return of the Genesee River to its ancestral valley just northeast of Portageville at the south end of the park. The river was forced west to the lowest divide and there it cut a new channel and began carving canyons through solid rock. A series of three waterfalls continues to deepen the gorge as they erode upstream [southward]. At Inspiration Point a short walk takes you to an overlook with a distant view of the Middle and Upper Falls.

From there we backtracked slightly to a side road and a short drive to Trailside Lodge for a picnic lunch.  Some years we have a little company; this year we had it all to ourselves. There are lots of tables inside, the building is heated and it turns out there are heated restrooms there too.  Our more-regular Thanksgiving dinner would be later at home.

Fireplace inside Trailside Lodge where we ate a picnic lunch -- © Dave Spier

District #2 schoolhouse beside the road to the trout pond -- © Donna Mason-Spier

Cross-bedded sedimentary rock layers on a natural joint plane
[roadcut beside main park road] -- © Donna Mason-Spier

After lunch, we continued south with a brief stop at the old schoolhouse near the Trout Pond and then down the hill past Glen Iris to a one-way drive descending to the old flood plain and a choice of parking areas. Our first direction was a short walk south to the Upper Falls which was nearly obscured by spray and mist rising from the plunge pool. It’s difficult to see, but the caprock is 28 feet of Nunda sandstone supported by weaker Gardeau sandstones and shales. Both formations are part of the late-Devonian West Falls group which in turn is part of the larger Catskill Delta underlying the Finger Lakes and Genesee regions.
 

Trail to Upper Falls -- © Donna Mason-Spier
Deh-ge-wa-nus Creek descends to the river above Upper Falls -- © Donna Mason-Spier

At Letchworth Park, you can walk uphill past the crest of the Upper Falls and look back to see a rainbow in the mist when conditions are right. The rainbow is highest in late fall and early winter when the sun is near its lowest angle of the year. In the afternoon, the rainbow is downstream from the west side trail.  If you go, you might want to also take some pictures of the historic 234-foot high steel railroad bridge. They're talking about replacing it with a modern arch bridge.

Rainbow in the mist below Upper Falls -- © Donna Mason-Spier

From the Upper Falls it’s an easy half-mile walk north along the Genesee River toward the Middle Falls, probably the most spectacular of the three falls and the main attraction in the park.  Along the way we stopped to take a few pictures of the river which was unusually high and muddy for this time of year due to recent heavy rains.

Ripples on the Genesee River above Middle Falls -- © Donna Mason-Spier

Outcrop in the Genesee River above Middle Falls -- © Donna Mason-Spier

First hint of rainbow in the mist below crest of Middle Falls -- © Donna Mason-Spier

 If you continue north on the trail past the crest you’ll reach clearer views of the falls itself. Watch for another rainbow in the mist along the way. William Pryor Letchworth built his Glen Iris mansion overlooking this falls. It descends 107’ over rocks of the Gardeau formation.

Middle Falls, 107’ high, seen from below William Pryor Letchworth's mansion at Glen Iris -- © Donna Mason-Spier

Rainbow in the mist below Middle Falls -- © Donna Mason-Spier

Letchworth Park blog to be continued...

(In the meantime, you might want to check the Genesee River Wilds Project working to develop a series of parks and trails along the river from Letchworth south to Potter County, PA.)

Tuesday, November 15, 2011

Common Milkweed -- Part 1 (autumn)

Ripe pods splitting open to release silky floss can mean only one thing -- the milkweed seeds are ripe and ready for dispersal on autumn and winter winds. -- © Dave Spier

Milkweeds need almost no introduction. In fact, the Common Milkweed (Asclepias syriaca) is just that -- common and widespread in fields and roadsides. The genus name refers to Asclepius, the Greek god of healing, because of the plant's use in folk medicine, much of it derived from native American practices. A quick word of caution, though. Avoid the milky juice which contains toxic compounds including alkaloids, glycosides and cardenolides. Monarch butterflies are immune to the effects of these substances and use them to their advantage by laying their eggs on the plant. The caterpillars eat the leaves, ingest the toxic substances, and become noxious prey to would-be predators. Apparently the effects last into adulthood. One experience of getting sick is probably enough to ward off a bird from eating any more larvae or adults. (Given the date of this post, I'd say this is no longer an issue till next summer.)

The species name, syriaca, is a case of mistaken identity. When the plant arrived in Europe (before 1753) it was believed to have come from the Middle East. Actually this particular species is native to North America. Worldwide, there are 140 species of milkweeds. Once considered to be a family of plants, the group has been downgraded to the rank of subfamily in the dogbane family.



Early settlers used milkweed fluff to stuff pillows and mattresses. The silk could also be spun into candlewicks. Fibers from the milkweed stalk could be made into thread, cloth, fish nets and purses.

The Common Milkweed's sticky, white sap can be used to make a natural rubber. During World War II, when tree latex from Malaysia became unavailable, the government experimented with milkweeds. Commercial-scale production of rubber would have required the redesign of existing processing facilities, so the effort floundered. Eventually most natural rubber was replaced by synthetics made from petroleum.

Milkweed did come to the rescue of the life-preserver industry which had relied on kapok from Java. When that source was cut off in 1942, school children and scout troops in 26 states were paid 20 cents for each onion bag they filled with ripe milkweed pods (roughly 800 pods per bag). The flossy seed hairs are waxy on the outside and hollow on the inside (much like kapok). This makes them super-light and water resistant, which is perfect for life vests. Less than two pounds of filling could keep a sailor afloat on the sea for two days. After the war, milkweed again sank commercially because it was cheaper to import kapok. The only remnants of the war effort are the nicknames silkweed, Virginia silk, cottonweed and wild cotton.

Part 2 discusses summer flowers and part 3 the summer butterflies that use the plant.

Questions, comments and corrections may be sent to northeastnaturalist@yahoo.com More nature articles can be found on the website http://adirondacknaturalist.blogspot.com Connect with me on Facebook and my photo page. There is a 3rd page to create a Northeast Naturalist community.


Common Milkweed seeds travel on silky parachutes -- © Dave Spier

Tuesday, November 8, 2011

November Trails -- Part 2 -- © Dave Spier

Gray Squirrel digging -- © Dave Spier

I'm dressed in complete camouflage, including face net and gloves, and sitting against the base of a tree trunk. A Gray Squirrel approaches, stops momentarily to dig in the leaves, and then continues on its way less than four feet from me. It's totally oblivious to my presence because I'm motionless. This is surpassed only by a memorable experience many years ago, even before I switched to camouflage clothing, when a chipmunk walked across my shoe, unaware of its nature or the presence of potential danger. I was sitting on a log, but again the secret was remaining perfectly motionless and silent.

Autumn's leafy pallet has mostly fallen, but the woods still have color in the sunlight. Green grass and ferns contrast with brown leaves littering the ground while gray tree trunks reach to blue sky. The afternoon's warmth brings out a solitary tree frog peeping in the swamp. Most amphibians are now buried in the mud to hibernate through the winter. Even the hardy tadpoles of bullfrogs and green frogs, the ones that take two years to mature, are now scarce in shallow ponds.

Insects are plentiful. Flies, gnats, crickets and other flying arthropods seem out of place for November, and where there are insects, can spiders be very far? I know I've been sitting too long when I notice a spider stringing webs across my camera tripod.

Daylight is fading as a Pileated Woodpecker, the largest of our tree knockers, flies through the forest canopy and lands high in a tree and lets out its typical repetitive call, similar to a flicker, but louder.

Deer scat (droppings), Allegany County, NY -- © Dave Spier
At dusk I leave the woods, having once again succeeded in finding scads of deer signs -- trails, tracks, scrapes, rubs and scat [droppings] -- but not a single, breathing whitetail. They wait for the cover of darkness to move about. I pass some apple trees on the ridge, another good location for deer, but all I see is the rear end of a cottontail rabbit (another white-tailed vegetarian) as it disappears into the weeds.

What did you see during the warm spell? Contact me at northeastnaturalist@yahoo.com More nature photos can be seen at http://www.flickr.com/photos/dave_spier and http://picasaweb.google.com/northeastnaturalist 


November Trails -- Parts 1 & 2 are based on an original slide program by Dave Spier.

Buck rub, Letchworth State Park, NY -- © Dave Spier

November Trails -- Part 1


November Trails
© Dave Spier

Unexpectedly warm and sunny weather followed the first feeble attempt at an autumn snowfall. Call it Indian Summer, or just call it enjoyable. Mornings were chilly and dew-laden, but that's normal November. I hope you have a chance to get out and savor the weather before things go downhill again.

The trail through the field back to the woods is dotted with open milkweed pods releasing brown seeds to float on white down. The zebra-striped Monarch caterpillars that fed on the toxic white sap of the summer leaves long ago transformed to butterflies and headed south toward their winter home in Mexico. You might have noticed the Canadian Monarchs passing through New York in early October.

Near the milkweed, the once-plump, off-white berries on Red-panicled Dogwoods are now wrinkled and dry. Chickadees have been snatching as many of the fruits as they can, and the ones that fall to the ground become food for grouse. The shrub's name comes from the red stems that hold the berries, but the gray bark on the main branches gives it the alternate name, Gray Dogwood. [see the previous blog post] Next to the dogwood, a flock of Purple Finches landed in a small tree and then flew again in unison. These birds, red-raspberry relatives of goldfinches, breed across southern Canada and winter in the eastern half of the United States. We see them most often during their migrations.

In the middle of the field, a thorny rosebush is covered with tasteless rosehips that are nonetheless high in vitamin C. These small, red fruits are credited with supporting the expansion of the mockingbird from its southern strongholds to the cold climates of Upstate New York.




Northern Mockingbird in Multi-flora Rose bush -- © Dave Spier

In the woods, small beige moths flit among the trees while a pair of Red-bellied Woodpeckers chase each other from one tree trunk to the next. In spite of brilliant scarlet feathers on the nape (back of the neck) and crown of the male, the bird is named for an obscure patch of salmon red on the belly between the legs. The bird has to be at just the right angle to see it. The problem with the name is that another woodpecker with an entirely red head and neck took the name Red-headed Woodpecker. That species is a southern bird; we seldom see them in the Finger Lakes region.

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