What is "falco peregrinus"

Peregrine \Per"e*grine\, a. [L. peregrinus. See Pilgrim.] Foreign; not native; extrinsic or from without; exotic. [Spelt also pelegrine.] ``Peregrine and preternatural heat.''
--Bacon.

Peregrine falcon (Zo["o]l.), a courageous and swift falcon ( Falco peregrinus), remarkable for its wide distribution over all the continents. The adult plumage is dark bluish ash on the back, nearly black on the head and cheeks, white beneath, barred with black below the throat. Called also peregrine hawk, duck hawk, game hawk, and great-footed hawk.

Falcon \Fal"con\, n. [OE. faucon, faucoun, OF. faucon, falcon, ?. faucon, fr. LL. falco, perh. from L. falx, falcis, a sickle or scythe, and named from its curving talons. Cf. Falchion.]

1. (Zo["o]l.)

   1. One of a family ( Falconid[ae]) of raptorial birds, characterized by a short, hooked beak, strong claws, and powerful flight.

   2. Any species of the genus Falco, distinguished by having a toothlike lobe on the upper mandible; especially, one of this genus trained to the pursuit of other birds, or game.

      In the language of falconry, the female peregrine ( Falco peregrinus) is exclusively called the falcon.
      --Yarrell.

2. (Gun.) An ancient form of cannon.

   Chanting falcon. (Zo["o]l.) See under Chanting.

falcon-gentil \fal"con-gen`til\, falcon-gentle \falcon-gentle\, n. [F. faucon-gentil. See Falcon, and Genteel.]

1. (Zo["o]l.) any female falcon; especially

2. (Zo["o]l.) a female peregrine falcon ( Falco peregrinus).

   Syn: falcon-gentil.

3. (Zo["o]l.) The female or young of the goshawk ( Accipiter gentilis, formerly Astur palumbarius).