A
Rite of Spring
by
Mike Roberts, Contributing Columnist
Although gardeners and farmers detest
them, woodchucks are the only wild creatures recognized by a distinctive
calendar date, and with much ado!
By the end of January most of us are
ready for spring, especially when cold winds continue to howl and snow
blankets the landscape. While enduring these physical and mental
discomforts, our hope for seasonal change hinges upon the ticking biological
clock of a fat little creature that sleeps away the toughest parts of
winter. If, on Feb. 2, the groundhog awakes from hibernation and does not
see its shadow, Old Man Winter is soon to release his icy grip on the Great
Outdoors. More often than not, however, the mammalian weather prophet�s
shadow frightens the animal back into its den for six additional weeks of
wintry conditions. This celebrated legend dates back to Colonial America and
European tradition. Ironically, even with all the fame and glory, most
people know very little about this common, backyard animal.
The woodchuck, or groundhog, (Marmota
monax) belongs to the order of mammals called rodentia, or in layman�s
terms � the rodents, which in Virginia range from less than an ounce in
weight (white-footed mouse) to over 70 pounds (North American beaver). The
common denominator for rodents, whether large or small, is their behavioral
need to gnaw. All rodents have a pair of sharp incisors on both the upper
and lower jaws that grow as long as the animal lives. Eating food and
gnawing on inanimate objects, such as rocks, wood, and deer antlers, help
wear down incisor length. Occasionally, through misalignment (malocclusion)
or failure to gnaw regularly, the incisors continue to grow until the animal
cannot eat or the skull is penetrated. Either way, the outcome results in a
slow and agonizing death.
Averaging about 2 feet in body length
and typically weighing less than 12 pounds, the woodchuck is a prey species
hunted primarily by coyotes, foxes, domestic dogs, red-tailed hawks and
great-horned owls. Groundhogs regularly sit upright on their haunches to
better utilize peripheral vision that is designed to detect motion. When
alarmed by a predator, these sharp-eyed creatures communicate the danger to
others of their own kind with a loud, sharp whistle, giving origin to the
colloquial name �whistle pig.�
Perhaps the one habit that gets
woodchucks in more trouble than any other is excavating holes in hayfields
and pastures, which can cause injury to livestock and damage to farming
equipment. Nevertheless, digging is what groundhogs do best. Their burrows
are usually located on well-drained hillsides near rock piles, trees and
buildings that afford added protection from the relentless onslaught of
predators. Regardless of whether they reside in an old or new den,
woodchucks constantly renovate their living quarters. Occupied dens are easy
to identify because of fresh dirt piled high at the entrance. This elevated
platform provides an area essential to basking in the sun and observing the
surrounding area for potential threats.
The den consists of a primary entrance
and a long, main tunnel leading to a series of individual chambers. Besides
the highly visible main entrance, the burrow usually has two or more
concealed entrances that can be utilized in case of an emergency. If
predator pressure becomes too intense, woodchucks are quick to relocate,
either renovating an abandoned den or digging a new one. These solitary
rodents do not share den sites.
When it comes to food, woodchucks are
recognized as true herbivores. Having flat molars designed to grind rather
than tear, they only eat plant material. Just about any vegetation
containing chlorophyll is palatable. Above and beyond the wide variety of
grasses and weeds consumed, woodchucks relish garden vegetables, alfalfa,
clover, soy beans, and corn, often to the point of being quite destructive.
For this reason many farmers allow hunting access to sportsmen seeking
permission to polish their summertime shooting skills. Primarily ground
dwellers, woodchucks regularly climb fruit trees to feed on apples, peaches,
pears, and cherries.
Woodchucks can be destructive, but
let�s give credit where credit�s due � abandoned woodchuck dens are
beneficial to other species of wildlife, especially cottontails, during
periods of cold weather. Red and gray foxes frequently modify the vacant
holes to raise their own families. Raccoons, opossums, and skunks often seek
refuge in deserted groundhog dens as well.
With the approach of autumn, woodchucks
begin gorging themselves to pack on additional fat needed to survive winter
hibernation. Depending on temperatures and food availability, they sometimes
remain active until late November. When outside conditions necessitate
action, groundhogs retire to a selected chamber in the den and curl up for
most of the winter. As with all true hibernators, the animal�s body
temperature drops substantially and metabolism all but ceases.
Woodchucks awaken from their slumber
sometime during February or March. This time of the year food is practically
nonexistent, but previously stored body fat serves to maintain the animals
until springtime plants begin to grow. Males are the first to appear,
traveling from den to den looking for potential mates. Whenever these
ill-tempered suitors cross paths violent fights erupt over the annual
breeding rights. Nasty dispositions and sharp incisors often make for bloody
confrontations, battle scars and torn ears. After initial breeding the
polygamous males continue to search for receptive females.
The gestation period is approximately
one month, with the average litter of four babies being precocial at birth
(blind and hairless). At about three weeks of age the fully furred and
opened-eyed chucks begin to explore the area around the den entrance. From
the time they first emerge these fuzzy little fellows begin nibbling on
plants. By the end of the summer the fast-growing youngsters are on their
own to establish individual homes. Like most prey species, the majority of
the offspring will succumb to predation within the first six months of life.
Now that we know more about this cuddly
little critter, the question remains, �How much wood would a woodchuck
chuck if a woodchuck could chuck wood?� I�ll never tell!
Wild Bird Profile: Canada
Goose (Branta canadensis)
Few things have inspired
more artists, poets, and writers than the V-formations and resonating calls
of migrating
Canada
geese. Perhaps Aldo Leopold, in his timeless book, A Sand County Almanac,
best described the instinctive intelligence of these geese by declaring that
songbirds predicting spring in error can reverse such predictions through
silence and hibernating animals that wake too early have opportunity to
return to their chambers. The Canada goose, however, winging its way
northward, has much more at stake � making its appearance a true harbinger
of spring!
While in most of North
America�s waterfowl flyways
Canada
geese continue to migrate seasonally as they have for thousands and
thousands of years, the vast majority of those in the Atlantic passage are
no longer members of the frequent-flyer club. Gone are the days when
countless skeins passed high over
Virginia
on their way to and from
North Carolina
�s Currituck Sound. For whatever environmentally related reason, several
generations of these big birds opted for permanent residency instead of
returning to their summer breeding grounds in far northern latitudes. Now,
because of population increase and damage to winter grain crops and golf
course greens, plus the invasion of urban lakes and ponds, the popularity of
the Canada goose has diminished greatly.
Throughout
Virginia
, resident
Canada
geese begin breeding activity during March. The nest, constructed of grasses
and lined with down feathers from the female�s body, is almost always
located near water. The five to six large, cream-colored eggs are incubated
by the female, under watchful eye of the gander, for approximately 28 days.