What do Swainson hawks eat?

What do Swainson hawks eat?

The Swainson’s hawk feeds on small mammals, large insects, birds, and reptiles [9,14,31,35]. During the breeding season, the Swainson’s hawk primarily preys on small mammals, especially young ground squirrels (Spermophilus spp.), pocket gophers (Thomomys spp.), and some microtines [15,20,31,32].

Are ferruginous hawks carnivores?

Ferruginous hawks are carnivorous, eating ground squirrels, mice jackrabbits, birds, amphibians and reptiles. Sometimes they will eat meadowlarks, snakes, lizards, grasshoppers, and crickets.

Are rough-legged hawks carnivores?

Diet. This species is carnivorous, typically feeding on small mammals, which make up 62–98% of its diet. Lemmings and voles are the major prey items of this species, seasonally comprising up to 80–90% of their prey, but this varies with seasonal availability.

What do rough-legged hawks eat?

During the breeding season Rough-legged Hawks feed primarily on small rodents such as lemmings and voles. In winter, small mammals—including mice, shrews, and voles—are the predominant prey. Rough-legged Hawks also take larger mammals including Arctic Ground Squirrels and rabbits.

Is the Swainson Hawk endangered?

Swainson’s hawk (Buteo swainsoni) is listed as State-Threatened under the California Endangered Species Act (April 17, 1983). It is considered an uncommon breeding resident and migrant in Northern California, and occurs primarily in the Central Valley and on the Northeastern Plateau.

What sound does a Swainson Hawk make?

Calls. Adults make a shrill kreeeeee alarm call when perched or in flight, often in response to intruders at the nest. The piercing call lasts 2–3 seconds, fading at the end. The female Swainson’s Hawk also gives a shorter, lower-pitched version of the call when the male brings food to the nest.

Is a Ferruginous Hawk an eagle?

Almost an Eagle Noted ornithologist Arthur Cleveland Bent evocatively described the Ferruginous Hawk as “the largest, most powerful, and grandest of our buteos, a truly regal bird.” Among this hawk’s eagle-like qualities are its large size — about two feet long with an impressive 4.7-foot wingspan.

Are rough-legged hawks omnivores?

The Red-tailed Hawk is a carnivore (meat-eater) that eats mainly rodents, but also rabbits, reptiles, and other birds. At Cosley Zoo, the hawks are fed mice and quail.

Is a rough-legged hawk a primary consumer?

Hawks are carnivores that eat toads. Therefore they are one trophic level higher than toads. They are considered tertiary consumers.

Are Swainson hawks rare?

Swainson’s hawks are a rare site to see. In California, Swainson’s hawks have historically lived on the Modoc Plateau, in the Sacramento and San Joaquin Valleys, along the southern coast, and at scattered sites in the Colorado and Mojave deserts.

Do Swainson hawks mate for life?

When Swainson’s hawks arrive at their nesting sites in March or April, they may return to their original nests as these hawks are noted to be monogamous. Research indicates that they have a high degree of mate and territorial fidelity.

What kind of food does Swainson’s Hawk eat?

Although Swainson’s Hawk is big enough to prey on rodents, snakes, and birds (and does so, while it is raising young), at most seasons it feeds heavily on large insects instead.

How is Swainson’s Hawk related to other small mammals?

The breeding distribution of Swainson’s hawk is tied very closely to the distribution of various small mammals for this reason. In Saskatchewan, for example, the distribution of Richardson’s ground squirrel and Swainson’s hawk are precisely the same. Swainson’s hawk will defend its breeding territory from other buteos.

How many Swainson’s Hawks are there in the world?

According to recent data from the Veracruz River of Raptors, scientists believe that there are more than 800,000 individual Swainson’s Hawks. Though this might seem like a big number, Swainson’s Hawks are facing some major threats both in their breeding and wintering grounds and in places in between.

Where do Swainson’s Hawk migrate in the winter?

Swainson’s hawk migration route. Small populations winter in southeastern Florida and along the Texas coast, probably having failed to find the way south around the Gulf of Mexico. Individuals reported north of these areas in winter (for example, on Christmas Bird Counts) are almost invariably misidentified buteos of other species.

Share this post