Yes, PASSERINES is a Scrabble word!

Letter values in Scrabble US: P 3, A 1, S 1, S 1, E 1, R 1, I 1, N 1, E 1, S 1.

Is it a valid word?

PASSERINES is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

perching birds mostly small and living near the ground with feet having 4 toes arranged to allow for gripping the perch; most are songbirds; hatchlings are helpless

Also: passeriform bird.