Crinoïdes

Keen Sight. The eagle has an advantage on Wisdom (Perception) checks that rely on sight.

Fall. The Crinoïdes fall on its enemy like a bird of prey. If it attack from above on the first turn it has advantage and his attack do double damage

Multiattack. The eagle makes two attacks: one with its beak and one with its Claws one with its feather.

Claw Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) slashing damage.

Feather. Melee Weapon Attack: +5 to hit, reach 10 ft., one creature. Hit: 7 (2d4) poison damage The target is Grappled (escape DC 15). Until the grapple ends, the target is Restrained. During each turn in the creature, it takes 2d4 poison damage up to  to creature can be in the feather at the same time.