Answer: birder

AnswerCrossword Clue
BIRDER

"Life list" compiler

BIRDER

Papageno, e.g.

BIRDER

Audubon Society member

BIRDER
Person likely to have binoculars
BIRDER
Jays' fan, maybe
BIRDEROrnithologist
BIRDEROrnithologist, e.g.
BIRDERSpotted owl spotter, perhaps