Otis, the Great Bustard

Otis tarda, the Great Bustard. An endangered, migratory species that once was found across the open grasslands of Europe and Asia.

Otis is the world's largest flying bird.

He also has a rather queer breeding display...

Otis stood in the center of the field, feathers ruffled, feeling proud yet slightly
ridiculous. He knew they all were laughing at him and his new outfit. It had
cost him years of hard work and energy, but he finally did it. This plumage
would set him apart from the rest of the boys. This would be his year.
This year he was gonna find a mate.

Otis is a loner. He looks really silly in that hat.
Judgmental Barn Owls would have a thing or two to say about this new 'fit.