Air Sac Install

This profile shows the wispy hair, scabby scalp, and muddy beak of the marabou stork. It also shows a lovely lump of flesh at the base of its neck. It looks like a melted balloon or a huge wad of gum.

That lump is actually an inflatable subcutaneous air sac. I have no idea why it sports one of those, but I can only imagine that it comes in quite handy. I'm planning on having one installed on the back of my neck, too.

Thanks for the photo, Fredda.

Photo courtesy: www.dimijianimages.com