If these birds look prehistoric to you, it’s because they are! Their regal appearance has changed very little in the last 30-40 million years. (you can’t, after all, mess with perfection.) adult brown pelicans, pictured 1-3, are distinguished by their brown-gray bodies and yellow crests, whereas juveniles, pictured last, have darker heads and feathers. Just like penguins and gannets, pelicans incubate their eggs by transferring heat through their webbed feet, unlike most other birds which transfer heat through a temporarily bare abdominal ‘brood patch.’ Among their other quirks, a pelican’s pouch, called a gular pouch, can typically hold up to three gallons of water, whereas their stomach can hold only one!