Cheep

Etymology
Onomatopoeic.

Verb

 * 1) Of a small bird, to make short, high-pitched sounds sounding like "cheep".

Noun

 * 1) A short, high-pitched sound made by a small bird.

Interjection

 * 1) The short, high-pitched sound made by a small bird.

Thesaurus
cackle, call, carol, caw, chatter, chip, chipper, chirk, chirm, chirp, chirr, chirrup, chitter, chuck, clack, cluck, cock-a-doodle-doo, coo, croak, cronk, crow, cuckoo, drum, gabble, gaggle, gobble, guggle, honk, hoo, hoot, peep, pip, pipe, quack, roll, scold, sing, squawk, trill, tweedle, tweet, twit, twitter, warble, whistle