ASL sign for PERCH

Definition: a thing on which a bird alights or roosts, typically a branch or a horizontal rod or bar in a birdcage; (of a bird) alight or rest on something.

Note: It's a classifer verb phrase. The dominant right-handed handshape is classifier that can represent a group of sitting animals or persons, whereas the passive left-handed handshape represents any form of long stick or a similar form.