Woodpeckers help control
insect populations and create nest cavities that are used by other
birds and mammals who cannot excavate the cavities themselves.
Nuthatches, screech owls, kestrels, starlings, squirrels, flying
squirrels, deer mice, and raccoons all use woodpecker tree cavities.
Woodpeckers are well adapted
to maneuvering around tree trunks searching for insects and spiders.
Their toes—two facing forward, two facing backward—enable woodpeckers to
grasp vertical tree trunks and their stiff tail feathers provide an
extra measure of support. With their sturdy beaks, woodpeckers can bore
holes into trees for feeding and chisel out cavities for nesting. Strong
muscles at the base of the beak act as shock absorbers to absorb the
pressure from the force of impact. Bristles lining their nostrils filter
out dust and tiny wood chips. To extract insects from crevices and
holes in trees, woodpeckers have a long, sticky tongue with a barbed end
with which they can snag insects. Some woodpeckers prefer dead
trees in which to excavate a nest while others choose live trees. Some
species will re-use a nest cavity from year to year while others prefer
to create a new one. Red-headed woodpeckers will use an existing cavity,
not necessarily of their own making.
Habitat loss poses the
greatest threat to woodpeckers. Developers
often cull dead trees from wood lots leaving the red-headed woodpecker without the dead and decaying
trees they need to nest and raise their young. In addition, developed
areas often encourage the presence of starlings, non-native birds that
invariably out-compete and displace woodpeckers for nesting sites.
Red-headed Woodpecker has some predators, such as raptors (hawks,
falcons, owls), and red-foxes. Eggs and chicks are taken by snakes,
raccoons and flying squirrels.
Red-headed Woodpecker feeds in open areas. It needs snags for nesting,
roosting and foraging. It can be found in open deciduous woodlands,
orchards, parks, agricultural areas, grasslands, forest edges, burned
forests.
No comments:
Post a Comment