1) Amateur 2) Audubon society member 3) Bird watcher 4) Life list compiler 5) Ornithologist 6) Papageno 7) Spotted owl spotter 
A person whose birdwatching status hovers somewhere between an obvious twitcher and an obvious dude. Birders are keen but not too obsessive, have well-honed bird identification skills, and are well acquainted with the local hot birding sites. Birders find the rarities for twitchers, and are generally happy to help dudes with the LBJs.
An individual who identifies and studies birds in their natural habitats. See Birdwatching.
• (n.) A birdcatcher.
Bird'er noun A birdcatcher. 
What most birdwatchers prefer to be called. See twitcher.
a person who raises birds. · See
Someone interested in watching birds, their avian-related hobby (not to be confused with Falco subbuteo).