Eastern Screech-Owl
Megascops asio

Red Morph

Gray Morph

Photos by: Ranger Monica Johnson

Still widespread and fairly common, but thought to have been gradually declining in various parts of range. Helped in some areas by provision of nest boxes.

Family: Owls

Habitat
Woodlands, farm groves, shade trees. Generally favors deciduous or mixed woods, but may be found in any habitat having some open ground and some large trees, from forest to isolated groves to suburban yards. May be absent from some areas because of lack of dead snags with suitable nesting holes.

This robin-sized nightbird is common over much of the east, including in city parks and shady suburbs, where many human residents are unaware they have an owl for a neighbor. The owl spends the day roosting in holes or in dense cover, becoming active at dusk. Despite the name, screech-owls do not screech; the voice of this species features whinnies and soft trills.

Feeding Behavior
Forages at dusk and at night. Hunts mostly by watching from a perch and then swooping down to take prey from the ground or from foliage. Also catches flying insects in the air. Can locate prey by sound as well as by sight.

Eggs
4-5, sometimes 2-8. White. Incubation is mostly by female, averages about 26 days. Male brings food to female during incubation. Young: Both parents bring food for young. Adults may bring back small, wormlike Blind Snakes and release them in nest, where the snakes burrow in debris in bottom of cavity, feeding on insects there, perhaps helping protect the young from parasites. Young leave the nest about 4 weeks after hatching, are fed by parents for some time thereafter.

Young
Both parents bring food for young. Adults may bring back small, wormlike Blind Snakes and release them in nest, where the snakes burrow in debris in bottom of cavity, feeding on insects there, perhaps helping protect the young from parasites. Young leave the nest about 4 weeks after hatching, are fed by parents for some time thereafter.

Diet
Mostly large insects and small rodents. Wide variation in diet. Eats many beetles, moths, crickets, other large insects. Catches mice and other rodents, shrews, sometimes bats; also some small birds, lizards, frogs, spiders, earthworms, crayfish, many other small creatures. Some catch many small fish.

Nesting
Courtship displays of male include bowing, raising wings, clicking bill. Male brings food to female. Mated pairs preen each other’s feathers, call in duet. Nest site is in cavity in tree, including natural hollows and abandoned woodpecker holes; will also use artificial nest boxes. Usually 10-30′ above ground, can be 5-80′ up.

Migration
Apparently a permanent resident throughout its range. Especially in north, may wander somewhat in fall and winter.

Songs and Calls
A tremulous, descending wail; soft purrs and trills. 

Text © Kenn Kaufman, adapted from 
Lives of North American Birds

Red-tailed Hawk
Buteo jamaicensis

Photo above by: Ranger Monica Johnson

Widespread and common. Apparently has increased in some areas since the 1960s, and numbers now stable or still increasing. In several regions of North America, Red-tailed Hawks are adapting to nesting in cities.

Family: Hawks and Eagles

Habitat
Open country, woodlands, prairie groves, mountains, plains, roadsides. Found in any kind of terrain that provides both some open ground for hunting and some high perches. Habitats may include everything from woodland with scattered clearings to open grassland or desert with a few trees or utility poles.

This is the most widespread and familiar large hawk in North America, bulky and broad-winged, designed for effortless soaring. An inhabitant of open country, it is commonly seen perched on roadside poles or sailing over fields and woods. Although adults usually can be recognized by the trademark reddish-brown tail, the rest of their plumage can be quite variable, especially west of the Mississippi: Western Red-tails can range from blackish to rufous-brown to nearly white.

Feeding Behavior
Does most hunting by watching from a high perch, then swooping down to capture prey in its talons. Also hunts by flying over fields, watching for prey below. Small prey carried to perch, large prey often partly eaten on ground.

Eggs
2-3, sometimes 4, rarely 1-5. Whitish, blotched with brown. Incubation is by both parents, 28-35 days. Young: Female remains with young most of the time during first few weeks. Male brings most food, and female tears it into small pieces to feed to the young. After about 4-5 weeks, food is dropped in nest, and young feed on it themselves. Young leave the nest about 6-7 weeks after hatching, but not capable of strong flight for another 2 weeks or more. Fledglings may remain with parents for several more weeks.

Young
Female remains with young most of the time during first few weeks. Male brings most food, and female tears it into small pieces to feed to the young. After about 4-5 weeks, food is dropped in nest, and young feed on it themselves. Young leave the nest about 6-7 weeks after hatching, but not capable of strong flight for another 2 weeks or more. Fledglings may remain with parents for several more weeks.

Diet
Varied, includes small mammals, birds, reptiles. Diet varies with location and season. Mammals such as voles, rats, rabbits, and ground squirrels often major prey; also eats many birds (up to size of pheasant) and reptiles, especially snakes. Sometimes eats bats, frogs, toads, insects, various other creatures; may feed on carrion.

Nesting
In courtship, male and female soar in high circles, with shrill cries. Male may fly high and then dive repeatedly in spectacular maneuvers; may catch prey and pass it to female in flight. Nest site is variable. Usually in tree, up to 120′ above ground; nest tree often taller than surrounding trees. Also nests on cliff ledges, among arms of giant cactus, or on artificial structures such as towers or buildings. Nest (built by both sexes) a bulky bowl of sticks, lined with finer materials, often with leafy green branches added.

Migration
Northern Red-tails may migrate far to the south, while many at central or southern latitudes (especially adults) are permanent residents. Most migration is relatively late in fall and early in spring.

Songs and Calls
High-pitched descending scream with a hoarse quality, keeeeer. 

Text © Kenn Kaufman, adapted from 
Lives of North American Birds

Barn Owl
Tyto alba

In recent decades, has declined slightly in some regions, drastically in others. Numbers are apparently stable or increasing in a few sites. May be helped in some areas by provision of nest boxes.

Family: Barn Owls
Habitat Woodlands, groves, farms, barns, towns, cliffs. Typically in open or semi-open country in lowlands. May nest in forest or city if nearby area has good open foraging territory, such as farmland, marsh, prairie, desert.

With its ghostly appearance, rasping shrieks, and habit of roosting in such places as church belfries, this bird has attracted much superstition. However, it is really a good omen for farmers who find it in their barns, for it preys chiefly on mice and rats. Discovered in its daytime retreat, the Barn Owl bobs its head and weaves back and forth, peering at the intruder. At night it is often heard calling as it flies high over farmland or marshes. One of the most widespread of all landbirds, found on six continents and many islands.

Feeding Behavior
Hunts at night, seldom by day. Seeks prey mostly by flying low over open ground, watching and listening; sometimes hunts by flying down from a perch. Has excellent vision in low light levels, and hearing is so precise that it can strike prey in total darkness.

Eggs
Usually 3-8, sometimes 2-12 or even more. Whitish, sometimes becoming nest-stained. Incubation is by female only, 29-34 days; male brings food to female during incubation. Young: Female remains with young at first and broods them while they are small; male brings food, female feeds it to young. After about 2 weeks, female hunts also. Age of young at first flight roughly 55-65 days. Young return to sleep at nest or nearby for several more weeks. 1-2 broods per year, sometimes 3.

Young
Female remains with young at first and broods them while they are small; male brings food, female feeds it to young. After about 2 weeks, female hunts also. Age of young at first flight roughly 55-65 days. Young return to sleep at nest or nearby for several more weeks. 1-2 broods per year, sometimes 3.

Diet
Mostly rodents. Feeds heavily on voles; also takes various kinds of mice, small rats, shrews, young rabbits, other mammals. Eats very small numbers of birds, lizards, insects, rarely frogs or even fish.

Nesting
In courtship, male performs display flight, including loud wing-claps; male feeds female. Nest: Uses sites in caves and hollow trees, also many artificial sites such as barn lofts, church steeples, abandoned houses, dry wells, crevices under bridges, nest boxes. Where no existing cavities available, will dig holes in dirt banks. No real nest built, but will arrange debris into crude depression.

Migration
Some remain all winter near northern edges of range, but some (perhaps especially young birds) move long distances southward in fall. A regular October migrant at Cape May, New Jersey.

Songs and Calls
Hissing notes, screams, guttural grunts, and bill snapping. Young give rapid grackle-like clicks. 

Text © Kenn Kaufman, adapted from
Lives of North American Birds

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Great Horned Owl
Bubo virginianus

Family – Owls

Habitat
Forests, woodlots, streamsides, open country. Found in practically all habitats in North America, from swamps to deserts to northern coniferous forest near treeline. In breeding season avoids tundra and unbroken grassland, since it requires some trees or heavy brush for cover.

Found almost throughout North America and much of South America is this big owl. Aggressive and powerful in its hunting (sometimes known by nicknames such as “tiger owl”), it takes prey as varied as rabbits, hawks, snakes, and even skunks, and will even attack porcupines, often with fatal results for both prey and predator. Great Horned Owls begin nesting very early in the north, and their deep hoots may be heard rolling across the forest on mid-winter nights.

Feeding Behavior
Hunts mostly at night, sometimes at dusk. Watches from high perch, then swoops down to capture prey in its talons. Has extremely good hearing and good vision in low light conditions. In north in winter, may store uneaten prey, coming back later to thaw out frozen carcass by “incubating” it.

Eggs
2-3, sometimes 1-5, rarely 6. Dull whitish. Incubation mostly by female, 28-35 days. Young: Both parents take part in providing food for young owls. Young may leave nest and climb on nearby branches at 5 weeks, can fly at about 9-10 weeks; tended and fed by parents for up to several months.

Young
Both parents take part in providing food for young owls. Young may leave nest and climb on nearby branches at 5 weeks, can fly at about 9-10 weeks; tended and fed by parents for up to several months.

Diet
Varied, mostly mammals and birds. Mammals make up majority of diet in most regions. Takes many rats, mice, and rabbits, also ground squirrels, opossums, skunks, many others. Eats some birds (especially in north), up to size of geese, ducks, hawks, and smaller owls. Also eats snakes, lizards, frogs, insects, scorpions, rarely fish.

Migration
No regular migration, but individuals may wander long distances in fall and winter, some of them moving southward.

Songs and Calls
Series of low, sonorous, far-carrying hoots, hoo, hoo-hoo, hoo, hoo, with second and third notes shorter than the others.

Text © Kenn Kaufman, adapted from
Lives of North American Bird