Cool art.

Looks like it’s based on the Walking with Beasts Phorusrhacos. It probably didn’t have wing claws, just like their modern seriema relatives.

Love the bird. ooh, and I didn't know they had hooked wings!! that's super cool!!

Looks great

The wing claw thing is outdated though, since Seriemas have the exact same wing anatomy as terror birds, yet still lack claws.