Owls

Add owls to the game. They will drop owl wings which will be able to craft a glider which will be similar to elytra but you can't use firework rockets with it, and it has less durability. Also it will give night vision when you have it equipped but only to some extent, as owls are known to be able to see I'm the dark well. Also it will not be able to maintain as much height as an elytra does and you will descend faster when using it in contrast with the elytra.