What is "chanting falcon"

Chanting \Chant"ing\ (ch[.a]nt"[i^]ng), n. Singing, esp. as a chant is sung.

Chanting falcon (Zo["o]l.), an African falcon ( Melierax canorus or musicus). The male has the habit, remarkable in a bird of prey, of singing to his mate, while she is incubating.

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.