"A wonderful bird is the pelican . . . "
Do you know that the Great White Pelican (Pelecanus onocrotalus) is a hefty bird with a wondrous gular pouch. The pouch hangs under the jaw (like a hammock), is expandable, and is used as a scoop for fishing.
I found this flock basking in the shallows of Lake Manyara, Tanzania.
Oh, and for the curious: the pouch can hold up to three gallons, three times more than its bellycan.