Barred Owl
Strix
varia
·
The Barred owl is a nocturnal, arboreal
bird, living in coniferous forests near a water source or wooded
swamps. Although the barred owl prefers to nest in
tree cavities, empty hawk nests, crows nests or squirrel nests.
·
Breeding
season occurs from December to March.
They are monogamous, pairing for life. A clutch of two
to three eggs will be laid in the nest; the female incubates the
eggs for about a month. While the female incubates eggs the male
will hunt for her.
·
Barred
Owls live in solitary sites for most of the year, only living
in groups from the breeding season until the young leave the nest.
They will call to other members of the species in the area if
disturbed. Their calls are very important in the mating ritual.
·
The Barred owl has an easily recognizable call that sounds like; "Who cooks for you.
Who cooks for you-all"
·
Their large eyes are fixed in the skull, making it necessary
for them to rotate their heads in order to change their view. Owls also have a distinctive facial disk (of
feathers) which helps to direct sound towards the ears. The hearing of
the Barred Owl is especially acute, due to the asymmetry of its
ears. Their right ear is larger and higher on their head than
the left ear, and this allows the owl to pinpoint the location
of a sound by comparing how much more quickly the sound reaches
one ear than the other (triangulation).
Diet
·
The Barred owl is carnivorous
and feeds on small mammals, birds, reptiles, amphibians and invertebrates.
Hunting is mainly done from a perch. Once prey is spotted, the
barred owl swoops down upon prey and grabs the prey with sharp
talons.
Did you know?
·
Barred Owls have been known to live up to
23 years in captivity and 10 years in the wild. Great Horned Owls are their only natural enemy.
·
The
flight of an owl is almost noiseless due to tiny fringe-like structures
found along the outer edge of each feather.
Unlike most bird feathers the outer ends of an owl’s flight
feather are not connected. This makes the edges softer and reduces
the noise they make allowing an owl to fly silently towards its
prey without detection.
Presently
found Most of N. America east of the Rockies.
Eastern forests, swamps from the Gulf Coast to southern Canada.
Florida, Texas, Central America.
Habitat
Deep, dark woods, both deciduous and coniferous. Hides
in thick foliage during the day. Primarily swamp and wetland
dwellers. Does not migrate. Home range can be 500+ miles. Not
present or extremely rare along Gulf Coast cheniers. Not found
in Central America (replaced by Mottled Owl.)
Size
18-20 inches in length. 3-4 foot wingspan.
Life
Span 14+ years
Description Large, round head. Brow-gray hornless (no ear tufts) owl with
white spots on the back, white streaks on the belly that run
lengthwise, and the white bars, from which their name is derived,
on the neck and breast that run crosswise. Eyes are brown.
Diet
Small mammals, reptiles, amphibians, crayfish, some birds.
ZOO DIET: mice, rats, chicks twice a week. Raptor diet. Fasts
two days a week. Mostly a nocturnal feeder.
Defense
Clicks beak, fluffs and lowers head when agitated. When
threatened, barred owls raise one wing and hold the other close
to their body. This may give the owl the appearance of a mammal
rather than a bird! ·Territorial in spring and fall and protect
their territory by hooting. This warns other owls that this
area is taken. If an intruding owl stays in the area after several
warnings, the owl will fly to the intruder and try to use size
and more aggressive calling to scare them off. Physical contact
is the last resort as sharp talons and beaks may be deadly to
both fighters. · Predators include Great Horned Owls, wild
cats and humans.
Reproduction Mate
for life. Prefer abandoned hawk or crow nests or cavities in
trees. Lay 2-4 white eggs, incubated 3-4 weeks by female. Fledge
at 6 wks, with several more weeks before becoming independent.
Senses
Exc. eyesight. Exc. hearing. Most vocal of
all owls. Best known call is a group of four hoots each howWHO-haWHOO!...howWHO-haWHOOAaahh!
Often represented as "Who-cooks-for-you? Who-cooks-for-you-all?
Tonal quality is a unique blend of bark and hoot. Are capable
of wails, moans, cackles, hisses, laughs, and long, loud humanlike
screams. Often call by day, especially before thunderstorms
Fun
info · AKA: Crazy owl or Swamp owl. · Can see 100X better than humans in darkness.
· Crows and other small birds tend to mob
and harass barred owl
·The spine-chilling shrieks, silent flight
and nocturnal habits of some owls have led many people to believe
that owls are magical or evil omens. Some people even believe
that owls are able to predict births and deaths. These and other
superstitions have led some humans to kill owls out of fear!
Brown Pelican
(Pelecanus occidentalis)
Presently
found: United States, Caribbean, South America, Galapagos
Islands. There are seven species of pelican (and four subspecies
of brown pelican) found worldwide.
Habitat: coastal regions
Size: weight – 3.6 kg to 5.0 kg (8 lbs to 11 lbs);
length – 120 cm to 130 cm (47 inches to 51 inches); wingspan
– 1.8 m to 2.1 m (6 ft to 7 ft)
Life span: up to 30 years
in the wild
Description:
Brown pelicans
are the smallest of the pelican species; they have brown and
white necks, creamy yellow crowns, brown back and tails, black
legs, and webbed feet. The foot-long bill is draped with a grey,
fleshy pouch.
Diet: Carnivores; Fishes, mainly those that are not considered commercially
valuable, such as herring, mullet, minnows, and silversides.
They may occasionally feed on crustaceans. Brown pelicans are
“plunge” feeders, diving into the water in response to the silvery
reflection of a fish near the surface. The scoop-like bill is
able to hold up to three gallons of water and fish; the water
drains out as the pelican tilts its head, leaving the fish behind
to be swallowed. Pelicans can eat up to four pounds of fish
per day.
Reproduction: Pelicans live and nest in colonies called
“rookeries”. The male pelican selects a nesting site in a shallow
depression in the ground or in a tree top and attempts to lure
a female. After the female pelican has chosen a male, nest building
begins and can take up to 10 days to complete. Two or three
chalky white eggs are laid and incubated by both male and female
for approximately one month.
Newly hatched pelicans are blind and featherless, completely
dependent upon their parents. Young pelicans take flight at
approximately 75 days.
Status: Listed as endangered
in CA, LA,
MS, OR, PR, TX, VI, WA, Central and South America; declassified
but being monitored in AL, FL. Pelican populations have steadily
recovered since the pesticide DDT was banned. High levels of
DDT water contamination were shown to cause shell weakness in
brown pelicans and subsequent declines in species’ reproduction.
Other fun Info:
·
Brown pelicans have air sacs beneath the skin that provide cushioning as
the bird makes impact with the water’s surface. The same sacs
allow the pelican to be more buoyant (float better).
·
A
pelican’s pouch can hold three times as much as its stomach.
·
A
pelican’s neck appears twisted. This is because the seventh
and ninth vertebrae (neck bones) are joined together, making
it impossible for the bird to straighten its neck.
Black Vulture
(Coragyps atratus)
Presently found:
Warmer parts of
the Western Hemisphere, seasonally from Southern Canada to central
Patagonia. Continental United States west from Texas through
Florida.
Habitat: Open countryside, urban and suburban
areas, where they can be seen at garbage dumps roadside, scavenging
refuse and road kill.
Size: Weight
– 0.9 kg to 2.0 kg (2 lbs to 4.5 lbs); length – 56 cm to 68
cm (22 inches to 27 inches); wingspan – 137 cm to 152 cm (54
inches to 60 inches)
Life span: Black vultures
have been known to live up to 30 years in captivity; lifespan
in the wild is likely much less due to predation, disease, or
limited food availability.
Description: The black vulture is a large black bird with a hooked beak and featherless
neck and head. The legs are thick and grey and the talons (claws)
are rather blunt. The black vulture has a broad wingspan and
is often seen soaring and circling with other vultures. It is
often confused with the turkey vulture, which has a pinkish
head and soars with its wings in a v-shape. In contrast, the
black vulture holds its wings straighter when soaring and has
white tips on the underside of each wing.
Black vulture wings are also shorter and rounder than
those of the turkey vulture. Young turkey vultures have a black
head and may be confused with adult black vultures.
Diet: Scavengers; feed
on carrion (the remains of dead animals). Unlike most birds,
black vultures do use their sense of smell to locate food. They
may also occasionally eat eggs or small, weakened animals. Black vultures are gregarious feeders and tend to flock around a
single large carcass.
Reproduction: Black vultures do not build nests; rather,
they lay eggs in caves, among rocks, or in tree hollows or bases.
A clutch of 2 eggs hatches after an incubation period of 35
to 45 days. Young fledge after approximately 70 to 80 days.
Status: No special status; common throughout their range.
Other fun Info:
·
Though New World vultures are often referred to as “buzzards”, this is technically
incorrect. While Old World vultures and New World hawks are
“buzzards” (members of the Buteo family), New World vultures
are more closely related to storks.
·
The unusual bald head of the vulture is an interesting feeding adaptation,
as it prevents bacterial infection as the bird’s head is submerged
in a carcass. (Head feathers would get very messy!)
·
Vultures are known to defecate on their own legs. This behavior seems to
have two benefits: (1) a cooling effect (2) cleansing bacterial
contamination caused by standing in/near carrion.
Great Egret
(Casmerodius albus)
Presently found: The
Northern United States from Maine and southern Canada; west
to the Great Lakes, south to Texas and the Gulf Coast; the Atlantic
Coast
Habitat: Wetland
habitats, including fresh and saltwater marshes, swamps, streams,
ponds, and lakes
Size: weight – 0.85 kg to 1.1 kg (30 ounces to 40 ounces); length
– 81 cm to 96 cm (32 inches to 38 inches); wingspan – 1.4 m
(55 inches); males and females appear similar, though males
may be slightly larger.
Life span:
up to 20 years in the wild
Description: Tall, slender white
bird with long black legs and black feet. The long legs aid
the bird in wading in marshy waters, while the feet of the great
egret are spread broadly to evenly distribute weight on muddy
surface. The long, pointed, yellow beak is used to pluck food
from the water. They are distinguished from snowy egrets, which
have black legs and yellow feet, and cattle egrets with yellow
legs and feet. During mating season, the beak of the great egret may appear more
orange, and long white feather plumes grow from the back and
extend beyond the tail. Neck
appears s-shaped in flight.
Diet: Carnivorous; hunting egrets seem
almost “frozen”, slowly wading through shallow water in search
of fish, insects, crustaceans, frogs, snakes and snails.
Reproduction: Great
egrets generally nest in the vicinity of other heron species,
building large platform nests in trees from twigs and stems
of marsh plants. Nests are usually begun by the male of the
species. Breeding begins around April, and females lay 3-5 eggs
that hatch after a 23-24 day incubation period. Great egrets are born semi-altricial (helpless),
remaining in the nest for the first three weeks to be cared
for by the adults. Young take flight approximately 40 days after
hatching.
Status: No special status. Early in the 20th
Century, egret numbers were highly diminished due to excessive
hunting for plumage. Populations have recovered after market
hunting was banned and egrets became a protected species. Numbers
are still affected by habitat destruction and human disturbance
of nesting sites.
Other fun Info:
·
While most other heron species tend to be nocturnal, great egrets can commonly
be seen in wetland areas hunting mid-day.
·
Great egrets are also known as American egrets and great white egrets.
·
Due to the high demand for egret plumage for ladies’ hats in the late 1800s
and early 1900s, egret feathers were worth twice their weight
in gold by 1903!