Oh, you knew they were odd birds, but they are even stranger than you knew. I had no idea they can change colors to impress the opposite sex!
When pelicans are courting, they open and close their bills to make their gular sacks ripple, strut around, and toss sticks and dried fish up into the air. Their bills and pouches also change color. For example, an Australian’s pelican’s pouch will turn bright pink, the throat turns yellow, and parts of the bill turn bright blue. Different species of pelicans display different color changes, but they are all vivid and beautiful.
Read more about pelicans, and see some great pictures at Environmental Graffiti. Link
(Image credit: Flickr user Teddy Llovet)