Category Archives: Acton WildAware

Fawn

By Linda McElroy

Fawn

Today’s WildAware article is submitted by Acton resident, Linda McElroy. Linda founded the Acton Land Stewardship Committee in the mid-1990s, and the Trail Through Time in the mid-2000s. The TTT, a Community Preservation Act project, highlights local Native American and Colonial landscape artifacts. Please visit https://trails.acton-ma.gov/trail-through-time/ for more information.

I was unloading gear onto the deck of my Maine cabin when I startled a doe. She leaped a few yards, stopped, looked back over her shoulder, and then loped down to the brook. As I resumed unloading, I realized that a tiny white-spotted fawn, absolutely still, was standing in low grass at the end of the deck. I approached it slowly to see it better. It never even blinked. I backed off, not wanting to frighten it.

Later, as dusk was coming on, I observed that it had lain down, partially hidden in the grass. Mom had not reappeared. I could only hope she would retrieve her baby during the night. Next morning, though, the fawn was in the same place. I began to worry about dehydration, need for food, etc. I called Inland Fisheries and Wildlife, left a message, and then phoned my neighbor, Joe.

Joe immediately came up the hill on his ATV, observed the fawn, and estimated it was a week old. He then slowly walked toward it, until it ran a few yards, to see if it was injured. It seemed healthy. He then turned his T-shirt inside out to stifle his scent, and dropped it over the fawn. He gently picked it up and returned it to the place its mother had left it.

He told me that fawns have evolved to remain still in tall grass while their mothers feed. Does will return twice a day to suckle their fawns until they are strong enough to accompany their mothers. Fawns are born without scent and thus remain safe even when predators are about. This strategy apparently has worked for many ages. Joe thought it best to leave the fawn alone until its mother moved it to another place.

The biologist at IF&W returned my call, and explained much the same information as Joe had done, adding that in modern times, farmers mowing their meadows in the spring have sometimes killed such fawns.

This event occurred in Maine, but the same species of deer live in the conservation land next to my home in Acton. They eat my tulips in spring, my hostas in summer, and crop my euonymus in winter. They occasionally rest at the back of my property, and when startled either snort or make a loud wheezing sound.

White-tailed deer, named for the white patch on the underside of their tails and rumps, are found from southern Canada south through much of the United States to northern South America. Does give birth in April to one or two fawns. Bucks grow antlers for the rutting (mating) season in the fall, shedding and regrowing them annually.

These deer are browsers, at home in lightly forested habitat with shrubs and low vegetation. Native Americans managed large deer parks, which they cleared of dense forestation and choking underbrush. Deer do not see well, sensing motion, scents, and sounds. When startled and running single file through wooded landscapes, they flick up their tails so their white patches can be easily seen by following companions.

An ancient, successful species, like other ungulates, it lives in herds for protection against predators, who may kill one animal while the herd survives. The downside of this beautiful, gentle, and robust animal is that, in recent years, it has acclimated to suburban areas where it thrives. As host to the tiny deer tick, which carries Lyme disease and other diseases dangerous to humans, it is now threatened in some communities that have instituted programs to eradicate white tails from their environs.

A few weeks later, Joe told me that he had seen the fawn, then much larger, with its mother, safely reunited.

Why is that Woodpecker Drumming on My House?

January 18, 2018

By Bettina Abe

“What on earth is that staccato drumming I hear penetrating the walls of my house?!” This fall Acton Natural Resources Division got a call from an Acton homeowner who noticed a bird pecking the fascia board of his house and wanted advice on how to make it stop.

There are a few common species of woodpecker one is likely to encounter in Acton and Boxborough’s forested habitats or at back yards feeders. One is tiny Downy Woodpecker (Picoides pubescens) about 6 inches tall, considered “dainty with a very short bill” according to David Allen Sibley, well-known ornithologist and author. Its drums are almost slow enough to count, about 9-16 per minute, a few seconds pause between drums. The Hairy Woodpecker (Picoides villosus), about 9 inches tall, has a sharper, louder and more high-pitched call than the Downy.  Its drum is a very fast buzzing, usually slowing at the end. The drumming is fairly long with a long pause between drums, four to nine per minute. Red-bellied Woodpeckers (Melanerpes carolinus) are frequently seen here, too. They are medium-sized with a fairly long bill and more distinctly marked by red sweeping from the top of its head down the back of its neck. They are about 9 inches tall. More likely to perch high up on a dead tree is the long-necked, broad-winged and long-trailed, unmistakable Pileated Woodpecker (Dryocopus pileatus), which is our largest woodpecker and is usually about 16.5 inches tall. Its call is loud, deep, resonant, often given in flight with higher-pitched calls on landing. Its drum is slow, powerful, accelerating and trailing off at the end; or short, up to three seconds long only one or two per minute. Other species that are common in Massachusetts are the Northern Flicker (Colaptes chrysoides), and the Yellow-bellied Sapsucker (Sphyrapicus varius).

Woodpeckers have strong bills that can chisel, peck and pull away bark in search of insect prey. They also excavate cavities in trees for nesting or as winter roosts. Pecking and drumming communicates with other woodpeckers. Fortunately, their reinforced, shock-absorbing skulls absorb the shock from the repeated blows. They have long tongues that are barbed and coated with bristles for spearing and extracting wood-boring insects or licking tree sap. They do not “sing” like other birds, but use sharp calls and rapid drumming to attract mates or announce territories. Occasionally, a woodpecker will drum on our houses or metal structures.

According to MassWildlife (Massachusetts Division of Fisheries and Wildlife), woodpeckers generally nest during April, May or June in tree cavities ranging in size from 1.25 up to 4.5 inches, which they line with wood chips. They lay between 3-10 eggs (depending on the species) that incubate for between 11-18 days. Both parents take turns sitting on the eggs. Some species migrate, while others are year-round residents in Massachusetts. They excavate the nest cavities not only to lay eggs, but also to create winter shelter.

Woodpeckers eat tree-dwelling insects including their larvae, pupae, and eggs. They also eat fruits, nuts and seeds. Some eat the sap that insects are attracted to. They have particular affinity to older, large diameter trees that indicate the presence of insect prey, rough or broken bark, dead or dying limbs, trunks damaged by weather or disease.

Though fascinating and important to the ecosystem, woodpeckers can cause problems for homeowners. Frequently in the fall, woodpeckers can damage the exterior of buildings with cedar, pine, fir, even redwood or plywood siding, including even aluminum flashing or vinyl siding. They seem to prefer wood that is brown or gray or natural-stained. Though woodpeckers are attracted to rotten wood, selecting a building does not necessarily indicate the presents of insects or unsound wood.

 Woodpeckers are strictly protected by the federal Migratory Bird Treaty Act and by state law. It is illegal to destroy, relocate, or possess these birds, their eggs, or nests.  

 So what can a homeowner do to prevent damage? The best methods are to discourage woodpeckers by scaring them away, or by using materials to prevent them from causing damage. It’s best to act quickly to try and intervene before a particular bird becomes habituated to damaging behavior.

Scare tactics may include yelling, clapping, loud music, or gently spraying with a garden hose. Hang strips of high-reflective tape or aluminum pie plates on strong over or near to the affected. It’s best to cover the spot that the woodpecker has been pecking with plastic sheeting, nylon tarp or plastic fruit netting. Attach the covering material so that it hangs at least 3 inches out from the wall to prevent birds from grasping the wall with its claws. Substitute wood trim with plastic/engineered products that are more dense than wood.

 References:

  1. The Sibley Guide to Birds, written and illustrated by David Allen Sibley; Alfred A. Knopf, Inc., New York. 2000.
  2. https://www.mass.gov/service-details/learn-about-woodpeckers
  3. https://www.massaudubon.org/learn/nature-wildlife/birds/woodpeckers/situations-solutions

Bettina Abe is a Town of Acton Natural Resources Assistant who introduced WildAware in 2015, with Paula Goodwin, a member of the Acton Conservation Commission and Land Stewardship Committee. The WildAware program is sponsored by the Acton Natural Resources Division and its purpose is to educate the community about the existence and habits of wild creatures, with the goal to increase community awareness of shared habitats. For information, call 978-929-6634 or send email to nr@acton-ma.gov.

Meeting a Moose at Midnight!

January 11, 2018

By Linda McElroy

Meeting a Moose at Midnight

This WildAware article is submitted by Acton resident, Linda McElroy. Linda founded the Acton Land Stewardship Committee in the mid-1990s, and the Trail Through Time in the mid-2000s. The TTT, a Community Preservation Act project, highlights local Native American and Colonial landscape artifacts. Please visit https://trails.acton-ma.gov/trail-through-time/ for more information.

I arrived at my Maine cabin-in-the-woods very late one August evening. Following my routine upon-arrival ritual, I first took the path down to the brook to listen to its voice and say “hello” to the creatures who live there. Then, I jogged along the short path to the pond, lantern in hand, carefully flashing its light from side to side so as not to startle anyone browsing in my woods.

Bursting out of the woods into the clearing beside the pond, I immediately sensed a strong rank odor. “I don’t remember the Beavers being that smelly”, I thought to myself. Scrambling up the embankment beside the dam, I scanned the entire area with the lantern. All was still. But I did notice that there seemed to be a rather long smooth opaque panel where brushy vegetation had always grown. “Better check that out”, I thought.

I moved a few steps closer, and trained the light on one side of the opaque panel, still puzzling why there was no definition of leaves and woody structure. Gradually, I swept the light along this panel to its other side. Toward the end of this scan, an extremely large eye was calmly studying me. “Moose!” my mind screamed, and my feet took off before I remembered that was not the thing to do.

This cow moose had had twins that year. I had observed them from my kayak at the marshy end of the pond, where she fed on the rich underwater grasses almost constantly, to provide enough milk for the two buff-colored calves, out of sight among the reed clumps. She would dip her entire horse-sized head–except for the ears–into the murky water for a few moments, then come up for air and a vigilant look around, while buckets of water poured off her head and shoulders. Thus, I had not expected to see her at my end of the pond.

At maturity, a cow moose weighs between 500 and 700 pounds, (bulls up to 1,000 pounds), may stand 6 feet at the shoulders, and first gives birth at three years of age. The largest member of the deer family, moose range throughout much of North America. They were abundant in Massachusetts until European settlers cut the forests for agriculture. But since the 1980s, a few are seen again in Eastern Massachusetts, as hunting restrictions have caused the population to burgeon.

Moose are browsers, and prefer wetland habitats, though they will keep mainly to forested areas. Calves born in mid-May remain with their mothers for about a year, when they are driven away as the cow prepares to give birth again. With birth weights of about 20 pounds, they can grow to nearly 300 pounds by the fall. Bulls, much larger, are also much darker than cows, who may be light-bodied.

A moose’s size and strength prevent predation from other animals, but human hunters, vehicles, and, more recently, ticks, claim quite a number of lives. Ticks do not transmit the diseases they carry to moose, as is also true with deer, but the sheer number of ticks now everywhere in Northern New England may weaken them through blood loss. An animal thus weakened may be taken by a bear.

In my hasty flight, I stumbled, fell, lost the lantern, and arrived at the cabin safely but completely out of breath. A better tactic, should you meet a moose, is to back away slowly and steadily without making eye contact. Never get between a cow and her young. Once a moose is aware of your presence, usually it will just majestically blend into the forest, and be gone.

 

Paula Goodwin is a member of the Acton Conservation Commission who introduced WildAware with Acton Natural Resource Assistant Bettina Abe. WildAware is a program sponsored by the Town of Acton Natural Resources Department that began in September, 2015. The purpose of WildAware is to educate the community about the existence and habits of wild creatures, and the goal is increased community awareness of shared habitats. For information, call 978-929-6634 or send email to nr@acton-ma.gov.

Exploring Exfoliating Bark

December 28, 2017

By Maggie Abe

 Textured Trunks: Exploring Exfoliating Bark

Today’s WildAware article is submitted by Acton resident, Maggie Abe. Maggie is a local artist who is a member of the Board of Directors of The Friends of the Acton Arboretum, Inc.

As winter approaches, the landscape grows starker. The green of summer dulls, then goes dormant. All too soon, fall’s conflagration flares and fizzles, the leaves becoming brittle and brown. One might think the Arboretum has little to offer in these bare months, but this is a wonderful time of year to examine features often overlooked in the surfeit of spring and summer. Exfoliating bark is a fascinating adaptation of a number of species showcased in the Arboretum and provides a welcome pop of texture during the leaner months.

Exfoliating or not, bark is vital to a tree’s health. A tree’s outermost bark is dead and shields the inner, living bark. The inner bark, phloem, carries the products of photosynthesis throughout the plant, becoming the outer bark as the tree grows. In the cambium layer, new phloem forms just under the bark; on its other side, the cambium also produces new sapwood, or xylem, which makes up the bulk of the tree and transports water. We see this growth in cross-section as annual rings, with the youngest rings being those farthest from the central heartwood.

Bark is referred to as “exfoliating” when it exhibits a peeling or flaking behavior. It is a natural process and allows the tree to quickly recover from injury—common in temperate regions with snowy winters—as well as rid itself of disease and pests. Some theorize that in birches (Betula spp.), exfoliating bark facilitates the removal of light-blocking lichens, enabling sunlight to reach the inner bark for photosynthesis. Shedding old bark could also provide a way for trees to undergo rapid growth in diameter without their bark fissuring, which weakens it. There are likely other benefits of exfoliation still unknown to us!

Detailed below are some trees with exfoliating bark living in the Arboretum. Appreciate their unique beauty year-round!

Dawn redwood (Metasequoia glyptostroboides)

The dawn redwood is an ancient tree originating in China and thought to be extinct until the 1940s. Harvard’s Arnold Arboretum is responsible for disseminating its seeds throughout the U.S.; today, it can be found in parks around the world. It has reddish bark, a sinewy trunk, and green needles that turn orange in the fall. There are four dawn redwoods in the Acton Arboretum: one across from the rain garden, another between the grape arbor and the hosta garden, and two in the rhododendron garden.

Japanese stewartia (Stewartia pseudocamellia)

Peer through the branches and you will see this tree’s beautiful trunk, silvery and mottled like the neck of a giraffe. The bark exfoliates in smooth patches. In the summer, it grows round white flowers with yellow centers. The Arboretum’s stewartia is located on the main lawn where the path first branches, visible from the parking lot.

Paperbark maple (Acer griseum)

This tree’s copper color stands out against the white of winter. Its bark peels off in luminescent, peach curls. You can find this tree by the Arboretum’s stone reading circle.

Bald cypress (Taxodium distichum)

This tree is reminiscent of something you might see in a primordial mangrove. Like the dawn redwood, it is a deciduous conifer, with soft green needles that turn russet in the fall. Curved protrusions called “knees” shoot off its roots and break the soil around the tree; they brace the tree and provide extra support in sodden soil and inclement weather. The tree’s flaky bark is especially evident on the knees. Head over to the rhododendron garden to find the Arboretum’s specimen.

River birch (Betula nigra)

While all birches have exfoliating bark, the sort that comes away in papery sheets and delicate curlicues, the river birch is “adaptable to both flood and drought and is more disease-resistant and heat-tolerant than any other birch” (Carlsmith, 1983). It has orange-tinged bark and maroon twigs. The Arboretum’s river birch grows in the understory study.

Bibliography

  • “Anatomy of a tree.” Trees, U.S. Forest Service, 2017. <fs.fed.us/learn/trees/anatomy-of-tree>
  • Carlsmith, Anne. “The River Birch.” Arnoldia, vol. 44, no. 1, 1983, pp. 29-31. <jstor.org/stable/42954180?seq=1#page_scan_tab_contents>
  • Kozlowski, Gregor. “Why do some barks peel?” Online posting. ResearchGate, 15 Oct. 2016. <researchgate.net/post/Why_do_some_barks_peel_What_are_the_advantages_of_exfoliating_for_a_tree
  • “Oh! That Exfoliating Bark!” Life on the Greenway, Rose Kennedy Greenway Conservancy, 31 Jan. 2013. <blog.rosekennedygreenway.org/2013/01/31/oh-that-exfoliating-bark/>
  • Rhoades, Heather. “Trees With Interesting Bark—Using Exfoliating Bark On Trees For Seasonal Interest.” Gardening Know How, Gardening Know How, 25 Mar. 2015. <gardeningknowhow.com/ornamental/trees/tgen/exfoliating-bark-trees.htm>
  • “Stewartia pseudocamellia.” Plant Profiles, Holden Arboretum, 2017. <holdenarb.org/horticulture/plant-profiles/stewartia-pseudocamellia/>
  • “The Dawn Redwood [Metasequoia].” About, The Bailey Arboretum, 2017. <baileyarboretum.org/the-dawn-redwood/>

 

 

Paula Goodwin is a member of the Acton Conservation Commission who introduced WildAware with Acton Natural Resource Assistant Bettina Abe. WildAware is a program sponsored by the Town of Acton Natural Resources Department that began in September, 2015. The purpose of WildAware is to educate the community about the existence and habits of wild creatures, and the goal is increased community awareness of shared habitats. For information, call 978-929-6634 or send email to nr@acton-ma.gov.

Oppossums: Beneficial Wildlife Neighbors

November 9, 2017

By Paula Goodwin

Opossums:Beneficial Wildlife Neighbors

The Virginia Opossum (didelphis virginiana) is found in Acton and throughout Massachusetts except for Dukes and Nantucket counties. The Opossums’ preferred habitat is on the edge of forests near streams and wetlands. It is one of the few animals that is becoming more common, although its natural life span is just about 2 years. The Opossum is North America’s only marsupial, (from Latin meaning  “pouch.”)

 

Male opossums are called jacks and females are called jills. After a pregnancy of  just two weeks, baby opossums are born. The tiny bee-sized joeys crawl into their mother’s pouch where they are protected and nursed for about 60 days. It is in the pouch that most of the joeys’ development takes place. At about 55 days the joeys finally open their eyes, crawl out of the pouch and cling to their mother’s back. The joeys ride along, learning from her the wide variety of foods to seek for their omnivorous diet that has earned them the reputation as one of nature’s sanitation workers! Their diet includes insects (including ticks), slugs, eggs, birds,frogs, plants, fruits and mammals as large as rabbits. They also eat human food and have been known to push over trash cans looking for leftovers. Opossums have a great need for calcium which they consume by eating animal bones.

 

Opossums are nocturnal mammals with enormous pupils which let in the dimmest light and long whiskers on the sides and front of their snouts which help guide their nightly foraging as they travel almost 2 miles through an area roughly 12 acres in size. Opossums are skilled climbers with opposable thumbs on their hind legs and a hairless prehensile tail that they use to anchor themselves in treetops to increase their reach for berries and other fruits. The tail is also used for carrying grass and leaves in a bundle when changing the bedding in its tidy den. Although opossums are often preyed upon by other nocturnal animals such as owls, foxes and bobcats, they are exceedingly resilient. If its loud hissing and the sight of its open jaws showing 50 pointy teeth does not deter a predator, the opossum will collapse to the ground with eyes open, mouth open and drooling, with its tongue hanging out. Its heart rate slows allowing it to lay very still as if dead, “playing possum” until the predator leaves. People think opossums might be rabid when they drool and hiss and carry on when threatened, but rabies in opossums is extremely rare. It may have something to do with the opossum’s low body temperature (94-97º F) making it difficult for the virus to survive in an opossum’s body.  Opossums have partial or total immunity to the venom of rattlesnakes and other poisonous snakes.

 

It turns out opossums are allies in the fight against Lyme disease. From Rick Ostfeld, senior scientist at Cary Institute of Ecosystem Studies: “Possums, like many other small and medium sized mammals, are hosts for ticks looking for a blood meal. But opossums are remarkably efficient at eliminating foraging ticks. Several years ago, scientists decided to learn about the part different mammals play in the spread of the ticks and the disease. They tested six species — white-footed mice, chipmunks, squirrels, opossums and veerys and catbirds — by capturing and caging them, and then exposing each test subject to 100 ticks. What they found, is that of the six, the opossums were remarkably good at getting rid of the ticks — much more so that any of the others. “I had no suspicion they’d be such efficient tick-killing animals,” Ostfeld said. Indeed, among other opossum traits, there is this: They groom themselves fastidiously, like cats. If they find a tick, they lick it off and swallow it. (The research team on the project went through droppings to find this out.) Extrapolating from their findings, Ostfeld said, the team estimated that in one season, an opossum can kill about 5,000 ticks.

 

 

University of Michigan BioKids: http://www.biokids.umich.edu/critters/Didelphimorphia/

NH Public Television: http://www.nhptv.org/natureworks/opossum.htm#6

Science Daily: https://www.sciencedaily.com/releases/2009/12/091215202320.htm

Mass Audubon-Situations and Solutions/Opossums: https://www.massaudubon.org/learn/nature-wildlife/mammals/opossums/situations-solutions

Cary Institute of Ecosystem Studies: http://www.caryinstitute.org/newsroom/opossums-killers-ticks

Opossum by Tom Jackson

Backyard Jungle Safari Opossums by Ann Tatlock

Mother Nature Network: https://www.mnn.com/earth-matters/animals/stories/10-things-you-didnt-know-about-opossums

Opossum Society of the United States: http://opossumsocietyus.org/faq-opossum/

Paula Goodwin is a member of the Acton Conservation Commission who introduced WildAware with Acton Natural Resource Assistant Bettina Abe. WildAware is a program sponsored by the Town of Acton Natural Resources Department that began in September, 2015. The purpose of WildAware is to educate the community about the existence and habits of wild creatures, and the goal is increased community awareness of shared habitats. For information, call 978-929-6634 or send email to nr@acton-ma.gov.