The bald eagle is a large
raptor. The adults have the characteristic white head and tail and
dark brown body. Juveniles are completely dark brown and do not
develop the white feathers until the fifth or sixth year. Adults
average three feet tall, weigh ten to twelve pounds, and have a
wingspan of seven feet.1 Females are generally larger than males.
The eagles mate for life, or until the death of their mate. Bald
eagles may live up to thirty years in the wild.2
Habitat: The southwestern bald eagle is found on
rivers with an adequate prey base and nesting area. The home ranges
generally exceed two miles along the river and half a mile wide on
each side of the nest. The eagles build their nests in trees,
cliffs, or pinnacles near the river.3
Range: The southwestern bald eagle historic range cannot be accurately
determined. The current range extends through Oklahoma and Texas
west of the 100th meridian, all of New Mexico and Arizona, and
California along the border of the Lower Colorado River. The eagle
may also range into Baja California and parts of mainland Mexico.
Diet:
The eagle feeds largely on four kinds of fish: channel catfish,
carp, Sonora sucker, and the desert sucker. Rabbits, coots, and
other small mammals, birds, and other fish also make up part of the
bird's diet.
Reproduction: Breeding pairs begin nesting in November
or December. The nest may be used year after year, eventually
reaching nine feet in diameter and weighing as much as 2,000
pounds.2 Two to three eggs are laid from January to March. The eggs
hatch from February to April. The eaglets spend up to two months in
the nest and four to six weeks on the home range before dispersing.
Sturnella neglecta Size: 21-28 cm (8.5 ‚ 11 in.) (size of a robin) Habitat/Range: Western provinces of Canada south
through Texas, northern Mexico. Range has spread eastward where it
occasionally breeds with the eastern meadowlark. Spends winters in
Nebraska and Utah. Eating Habits: Insects, seeds
This yellow-bellied bird
has a black V on its chest and streaked, brown feathers above. Its
yellow underparts are paler than on the eastern meadowlark.
Golden Eagles use their
tremendous eyesight to locate prey. They prefer to attack upwind, to
increase their aerodynamic control and maneuverability. The birds prey
upon a variety of creatures from prairie dogs, cottontail rabbits,
jackrabbits and ground squirrels to grouse, ducks, chukars, reptiles and
smaller birds. One study that reviewed the list of Golden Eagle prey
items in North America found the birds preyed upon (depending upon their
location) 52 species of mammals, 48 birds, 5 reptiles and 2 fish. The
birds will also feed on carrion, which sometimes results in death from
vehicle collisions or poisoning.
The Red-tail is the
largest hawk, usually weighing between 2 and 4 pounds. Hawks are
carnivores (meat eaters) who belong to the category of birds known as
raptors -- birds of prey. They have strong, hooked beaks; their feet
have three toes pointed forward and one turned back; and their claws, or
talons, are long, curved and very sharp. Prey is killed with the long
talons and, if it is too large to swallow whole, it is torn to
bite-sized pieces with the hawk's beak. The adult Red-tailed Hawk
is easily identified, for when it leaves its perch on slow, measured
wing beats, or turns while soaring overhead, the broad, rounded tail
shows a rich, russet red, hence the name. Within its range, its frequent
soaring and loud voice are a good pointer. The Red-tailed Hawk is
a most opportunistic hunter. Its diet is varied, but there is conclusive
evidence now that 85 to 90 % is composed of small rodents, with rabbits,
snakes and lizards included. Like all hawks, its talons are its main
weapons.
The Turkey Vulture is one of
North America's largest birds of prey. It reaches a length of 32 inches
with a wing span of 6 feet. Its overall color is brown-black with a
featherless, red head, white bill and yellow feet among mature adults.
Immature birds have a darker face. Although usually silent, the bird
will occasionally emit a soft hiss or groan.
Vultures are best known for their
practice of feeding on dead animal carcasses, but will occasionally
attack young and helpless animals as well. They obtain much of their
water from the moisture in carrion, and their powerful kidneys enable
them to excrete less water when expelling waste products.
Turkey vultures, like other carrion
birds, are protected from disease associated with decaying animals by a
very sophisticated immune system. Their unfeathered "bald" head is easy
to keep clean and is characteristic of vultures and condors throughout
the world.
Unlike most birds, vultures have a keen
sense of smell. Vultures are sometimes mistakenly called buzzards, the
British name for buteos -- hawks of the Buteo genus.
Athene
cunicularia Size: 23 cm (9 in.) Habitat/Range: The burrowing owl lives on the dry,
short-grass prairie. They can be found west of the Mississippi River
from southern Canada throughout the western U.S. south through Mexico
and into South America. Eating Habits: Burrowing owls feed on a wide variety of
insects, small rodents, lizards, and birds, depending on location and
time of year. This small owl, about eight inches tall, has long bare
legs, no ear tufts and a small facial disc. The owls are dusty brown
with white markings on the belly and a prominent white chin stripe.
Charadrius vociferus Size: 23-28cm (9-11 in.) Habitat/Range: Open fields, golf courses, and
prairies. Eating Habits: The kildeer eats insects.
Robin-sized. Brown on top, white on the bottom, with two
black bands across the breast. You will definitely hear this bird
before you see it. These birds are ground nesters and will feign
injury to draw predators away from their nest.
These birds
migrate in large flocks, often visiting traditional stopover habitats in
spectacular numbers.
A larger subspeciesof this bird, the
Greater Snow Geese (C. c. atlanticus), nests to the north of
eastern Canada. The smaller subspecies, the Lesser Snow Goose (C. c.
caerulescens), commonly occurs in two plumage variants. White phase
birds are white except for black wing tips, but blue phase geese have
bluish plumage replacing most of the white except on the head, neck and
tail tip. White and blue phase birds do interbreed and the young may be
of either type. Blue phase birds are rare among the Greater Snow Geese.
These birds mainly eat plant material,
found in shallow water or on land. Outside of the nesting season, they
usually feed in flocks. In winter, these birds feed on left-over grain
in fields
All herons
tuck their necks in an "S" curve while flying and lack the long, fluffy
tertials and red crown. The very rare Whooping Crane is white overall
with black primaries and a different head pattern.
Length: 37 inches Wingspan: 80
inches
Large, long-legged, long-necked
bird
Long, pointed bill
Holds neck straight both at rest
and in flight, not tucking it in like herons do
Dark gray legs extended in flight
Long, fluffy tertials droop down
over tail and primaries
Adult:
Dark bill
Unfeathered red crown and lores
Entirely gray plumage, that often
becomes stained with rust or brown, especially about the back and
wings
Roadrunners are ground cuckoos, are any
of about 15 species of birds constituting the subfamily Neomorphinae of
the Cuckoo Family (Cuculidae), noted for terrestrial habits. There are
11 New World species, 3 of which lay their eggs in the nests of other
birds.
The legendary Roadrunner is famous for
its distinctive appearance, its ability to eat rattlesnakes and its
preference for scooting across the American deserts.
When the Roadrunner senses danger or is
traveling downhill, it flies, revealing short, rounded wings with a
white crescent. But it cannot keep its large body airborne for more than
a few seconds, and so prefers walking or running (up to 17 miles per
hour) usually with a clownish gait.
The Roadrunner feeds almost exclusively
on other animals, including insects, scorpions, lizards, snakes, rodents
and other birds. Up to 10 % of its winter diet may consist of plant
material due to the scarcity of desert animals at that time of the year.
Because of its lightening quickness, the Roadrunner is one of the few
animals that preys upon rattlesnakes. Using its wings like a matador's
cape, it snaps up a coiled rattlesnake by the tail, cracks it like a
whip and repeatedly slams its head against the ground till dead.
It then swallows its prey whole, but is often unable to swallow the
entire length at one time. This does not stop the Roadrunner from its
normal routine. It will continue to meander about with the snake
dangling from its mouth, consuming another inch or two as the snake
slowly digests.
Long-billed Curlew
Numenius americanus Size: 51-66 cm (20-26 in.) Habitat/Range: Its habitats include prairies, salt
marshes, and mud flats. Breeds Southwest Canada and Western United
States. Winters in southern U.S. to Guatemala
Large shorebird with
a very long, curved bill. It is cinnamon brown above and buff colored
below.
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