Birds, so the owl or the raven, play their flying animation at times where it doesn't really make sense. They tend to enter their flying animation when swimming, or if they are pushed right to the edge of a block that drops down a level.

Version of Minecraft, Bewitchment, Forge, Patchouli, and Baubles used

BW: 0.0.20.1
Forge: 14.23.5.2838
Baubles: 1.5.2
Patchouli: 1.0-20

Screenshots encouraged

Water thing is not an issue, makes sense. This really seems too minor for going through the hassle of hitbox checks every frame- since the checks are handled on the client.