percher vs perching bird

percher and perching bird both are nouns.

Word	Noun	Adjective	Verb	Adverb
percher	Yes	No	No	No
perching bird	Yes	No	No	No

As nouns, percher and perching bird are synonyms defined as:

percher and perching bird: a bird with feet adapted for perching (as on tree branches); this order is now generally abandoned by taxonomists

Other synonyms of percher include Insessores, order Insessores.

percher (noun)	perching bird (noun)
a bird with feet adapted for perching (as on tree branches); this order is now generally abandoned by taxonomists	a bird with feet adapted for perching (as on tree branches); this order is now generally abandoned by taxonomists
a person situated on a perch