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American kestrels (Falco sparverius) are widespread throughout the Americas. The geographic range of these falcons stretches from Alaska southward to the southern tip of South America. They permanently reside in all, or parts of 35 of the 48 contiguous U.S states, the Gulf of California, northwest and central Mexico, and every country in South America except Brazil. They migrate, and are only summer...

Columba livia common pigeon; rock dove

...Other predators include the golden eagle (Aquila chrysaetos), American kestrels (Falco sparverius), and peregrine falcons (Falco peregrinus). Eaten by humans and used for laboratory research. A large number of pigeons living in a small area can be a nuisance to farmers. Some diseases (e.g., histoplasmosis) may be spread in pigeon droppings. Since pigeons are often fed by well-meaning city dwellers, their numbers...

Sauromalus ater Northern Chuckwalla

...Predators include red-tailed hawks (Buteo jamaicensis), American kestrels (Falco sparverius), coyotes (Canis latrans), and Mojave rattlesnakes (Crotalus scutulatus). Common chuckwallas are herbivorous, feeding on plants and occasional insects. Through fecal deposits and plant clearing, they impact diversity in the habitats they occupy. Important predators of common chuckwallas are red-tailed hawks (Buteo jamaicensis), American kestrels (Falco sparverius), coyotes (Canis latrans), and Mojave rattlesnakes...

Carduelis tristis American goldfinch

...Common predators of American goldfinches are blue jays (Cyanocitta cristata), eastern garter snakes (Thamnophis sirtalis), American kestrels (Falco sparverius), and weasels (Mustela). Domestic and feral cats (Felis catus) also prey on them. They have a defense call, but otherwise are usually non-aggressive towards their predators. Because the diet of American goldfinches consists of seeds and nuts, they help in the dispersal of seeds...

Thamnophis radix Plains Garter Snake

...Plains garter snakes may be preyed on by birds of prey, such as red-shouldered hawks (Buteo lineatus), Swainson's hawks (Buteo swainsoni), kestrels (Falco sparverius), and northern harriers (Circus cyaneus). Other predators include foxes (Vulpes), coyotes (Canis latrans), striped skunks (Mephitis mephitis), mink (Neovison vison), domestic cats (Felis catus), and milk snakes (Lampropeltis triangulum). Humans also incidentally and intentionally kill prairie garter snakes...

Ameiva ameiva Giant Ameiva, Amazon Racerunner

...Common predators of Ameiva ameiva include green snakes (Philodryas nattereri), roadside hawks (Buteo magnirostris), American kestrels (Falco sparverius), Guira cuckoos (Guira guira), chalk-browed mockingbirds (Mimus satturninus) and coral snakes (Micrurus frontalis). Giant ameivas are poorly adapted to introduced predators, such as mongooses (Herpestes javanicus) and house cats (Felis catus). Giant ameivas are hosts for a wide variety of microorganisms. Common parasites include Plasmodium...

Calypte anna Anna's hummingbird

...Calypte anna has many predators including western scrub-jays (Aphelocoma californica), American kestrels (Falco sparverius), greater roadrunners (Geococcyx californianus), and curved-billed thrashers (Toxostoma curvirostre). As a response to these predators, C. anna has developed two primary defense mechanisms. First, when a predator attacks a nest the female will mob the assailant. She will do this by hovering in front of the invader, beating...

Aimophila ruficeps rufous-crowned sparrow

...Other possible predators include American kestrels (Falco sparverius), white-tailed kites (Elanus leucurus), sharp-shinned hawks (Accipiter striatus), and Cooper's hawks (Accipiter cooperii). Snakes are probably important predators of eggs and nestlings, as they are in other Aimophila species. Rufous-crowned sparrows are primary consumers, as they eat vegetation. They are also secondary consumers, as they eat insects as well. These sparrows are...

Falco mexicanus prairie falcon

...No aggresive responses have been noted towards American kestrels (Falco sparverius), northern harriers (Circus cyaneus), sharp-shinned hawks (Accipiter striatus), and turkey vultures (Cathartes aura). The size of the home range varies geographically. Males tend to have larger home ranges than females. Home range size tends to decrease in the winter and increase throughout the breeding season. Vocalization is the most common form of...

Tyrannus tyrannus eastern kingbird

...Eastern kingbird adults are sometimes taken by aerial predators, such as American kestrels (Falco sparverius). Eastern kingbirds are aggressive and will energetically attack perceived threats, such as large hawks, crows, blue jays, squirrels, and snakes, whenever they are nearby. They will dive at a threat with their crest raised, exposing the red crown feathers, and with the mouth wide open, exposing their bright red...