In addition, he can inflate a large balloon-like sac from one of his nostrils.
It has prominent, round toe pads, and the male has a large vocal sac.
Three to six shriekers will emerge from their body where they have been growing in large sacs, killing the graboid.
Adult specimens may have large sacs on their necks.
Like all frigatebirds the male has a large red sac on the front of the throat which is inflated during courtship.
The disc also carries a large sac beneath it, which holds headcrabs that have not yet reached full size.
The male has a large, inflatible, hoodlike sac upon the head.
He swelled up, and inflated two large, bright red sacs on each side of his throat.
They have a third canal in a horizontal plane and beneath it a large sac.
These things have got large olfactory sacs, and their sense of smell is acute.
