birdwatch vs observe

birdwatch and observe both are verbs.

As verbs, observe is a hypernym of birdwatch; that is, observe is a word with a broader meaning than birdwatch:

birdwatch (verb)	observe (verb)
watch and study birds in their natural habitat	discover or determine the existence, presence, or fact of by perception with the eyes
	make mention of
	observe with care or pay close attention to
	watch attentively
	show respect towards
	behave as expected during of holidays or rites
	follow with the eyes or the mind
	stick to correctly or closely
	conform one's action or practice to