observe vs birdwatch

observe and birdwatch both are verbs.

Word	Noun	Adjective	Verb	Adverb
observe	No	No	Yes	No
birdwatch	No	No	Yes	No

As verbs, birdwatch is a hyponym of observe; that is, birdwatch is a word with a more specific, narrower meaning than observe:

Other hyponyms of observe include bird, monitor, supervise, monitor, reconnoiter, reconnoitre, scout, track.

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