Yes, LADYBIRDS is a Scrabble word!

Letter values in Scrabble US: L 1, A 1, D 2, Y 4, B 3, I 1, R 1, D 2, S 1.

Is it a valid word?

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

small round bright-colored and spotted beetle that usually feeds on aphids and other insect pests

Also: lady beetle, ladybird beetle.

Not playable in Scrabble US: LADYBEETLE.