A South American hawk (Herpetotheres cachinnans), so called from its notes, which resemble a shrill laughing.

Falco biarmicus, a large bird of prey found in Africa, southeast Europe, and southwest Asia.

Any of the small New World falcons of the genus Micrastur.

A medium-sized, very swift falcon, a sub-species of Falco peregrinus, (Falco peregrinus peregrinator) that hunts small birds.

(US, military, euphemistic) A supposed comrade whose actions harm his friends, often but not always, for his own benefit.

Falco berigora, a member of the falcon genus found in the drier regions of Australia.

Falco mexicanus

Possessing particularly good vision.

Polihierax semitorquatus, African pygmy falcon, native to eastern and southern Africa.

The female and young of the goshawk.