Definition of birdwatcher noun from the Oxford Advanced American Dictionary

 

birdwatcher

 noun
noun
NAmE//ˈbərdˌwɑtʃər//
 
(informal birder)
 
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a person who watches birds in their natural environment and identifies different breeds, as a hobby compare ornithologist
birdwatching
 
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(informal birding) noun [uncountable]
See the Oxford Advanced Learner's Dictionary entry: birdwatcher