泰然自若
tai.zen.ji.jaku

Literally: calm – “sort of thing” – self – (young) / similar

Alternately: Unflappable. Calm and self-controlled.

Notes: This is another compound of synonymous compounds; 泰然 means “composed; unmoved,” while 自若 means “self-possessed.”

This yojijukugo has a number of both synonyms, including 余裕綽々, and antonyms, including 小心翼翼 (“fearful”) and 右往左往 (“disordered”).

From this “note” account. The bird is saying “Flying kick!”