The image in that Wikipedia article then must be a rare photo of a frigate on the ground.

I remember being at the veterinarian and while waiting, I paged through one of the many animal books they had out (this one was lizards).

I laughed at one page (and took a picture), which showed an lizard with an inflatable pouch.

Underneath there was a picture of a Frigate with an inflated pouch, with the caption:

"FLASHY - The male Frigate bird attracts his mate in very much the same way the anole lizard does. He keeps his pouch inflated for several hours until she succumbs to his charms."

:)