- ornithologist, bird watcher - a zoologist who studies birds
--1 is a kind of zoologist, animal scientist
--1 has particulars: Audubon, John James Audubon; Wilson, Alexander WilsonDerived form: verb birdwatch1 - bird watcher, birder - a person who identifies and studies birds in their natural habitats
--2 is a kind of amateur
Derived form: verb birdwatch1