Radical 扌
16 strokes
hand 扌 (152a) + chirp
(631b) = exercise 操
This can mean “to grasp” and hence “to operate” (a machine).
操场 (530) cāochǎng sports ground

The bird sits on the fitness instructor’s hand and chirps to set the tempo for the exercise s. / The giant has joined the class because he is getting too stout.