Collocations for perch - verb

precariously
The hotel was perched precariously on a steep hillside.

on
The birds perched on nearby buildings.

be perched high above sth, be perched high on sth
The castle is perched high above the valley.

be perched on the edge of sth, perch on the edge of sth
I perched on the edge of his desk to listen to him.

be perched on top of sth, perch on top of sth

Perch is used with these nouns as the subject:
castle, crow, owl