树倒猢狲散

shù dǎo hú sūn sàn

When the tree topples the monkeys scatter. (idiom); fig. an opportunist abandons an unfavorable cause

Rats leave a sinking ship.

树

shù

tree

倒

dǎo

to fall; to collapse; to lie horizontally

猢

hú

used in 猢猻|猢狲[hu2 sun1]

狲

sūn

used in 猢猻|猢狲[hu2 sun1]

散

sàn

to scatter