I don't think you can use 'chant' for a bird. birds 'chirp' or 'sing' football fans chant! :)

chant (noun / verb) - a repeated, rhythmic phrase, typically one shouted or sung in unison by a crowd; to shout a word or words repeatedly. chanting (adj.) - when something is shouted in a repetitive manner. Examples: "The chants energized the audience." (noun) "What is the crowd chanting?" (verb) "The hockey team chanted 'Win! Win! Win!' before the game started." (verb) "The chanting fans echoed throughout the stadium." (adj.) As someone else mentioned, you want to use 'chirp' for the brief sound that birds make :) "The bird chirped loudly this morning." "The chirping birds are music to my ears."

Many thanks @merlyn. Exactly I want to use this word in translating a poem.

The only way you could use 'chant' is if you were writing something like poetry.