bird-watcher

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++ˈbird-ˌwatcher noun [countable]  HBBDLHsomeone who watches wild birds and tries to recognize different types 野鸟观察者；野鸟生态研究者 —bird-watching noun [uncountable]

Examples from the Corpus

bird-watcher• This confused bird-watchers, but the bird itself was fine.

ˈbird-ˌwatcher nounChineseSyllable  

and wild Corpus birds someone who watches tries

bird-watcher
ˈbird-ˌwatcher noun [countable]
someone who watches wild birds and tries to recognize different types
—bird-watching noun [uncountable]