Bird

There are more plastic Flamingos in the world than real ones. Designed by Don Featherstone in 1957, the iconic pink Plastic lawn ornament has sold over 20 million copies, while wild Flamingo populations across all six species total only about 3–4 million Birds.

During Japan's 1,200-year meat-eating ban, people devised creative loopholes. They classified rabbits as birds by calling their ears "wings," dubbed wild boar "mountain whale" to pass it off as fish, and claimed ducks were fish because they had webbed feet.

Most birds lack a penis—both sexes mate by pressing a single opening called a "cloaca" together. Ducks are an exception: their corkscrew-shaped penises can reach 42.5 cm, rivaling their body length. Unlike mammals, they achieve erection via lymph fluid in about one second.

The kiwi bird lays an egg weighing about a quarter of its body weight—proportionally the largest egg in the world. Thanks to this enormous egg, kiwi chicks hatch nearly fully developed and can survive on yolk nutrients for about two and a half weeks after birth.