Nearly all birds (except the ostrich) lack a urinary bladder. Instead, their urine is combined in their poop. This process removes water weight, helping them fly.

A big bird is a huge canary (8 feet tall). The canary is a popular songbird because of its singing and cute look. Tweety Bird is another famous cartoon canary.

In both World Wars, homing pigeons delivered important messages that helped save lives. Even today, it is suspected that homing pigeons are still used by some groups to carry messages across borders.

Found in Cuba, the smallest bird is the bee hummingbird. Its average length is between 2.2 to 2.4 inches. Its eggs are the size of peas, the tiniest among bird eggs.

The Gentoo penguin (found on islands not far from Antarctica) is the fastest in water. Its water speed of 22 mph is 3 times faster than other penguins (7mph).

The collective noun for a cluster of owls is a parliament, perhaps because owls have long symbolized wisdom. In the book Chronicles of Narnia, the author calls such a group a parliament.

The bearded vulture is the only identified vertebrate to have this particular diet. It generally disregards the meat, opting to feed on the bones. Small bones are swallowed, but big bones are dropped from the air to shatter them.

Found in Australia, the Bassian thrush (also known as the olive-tailed thrush) forages among piles of leaves. It farts to cause worms to move, exposing their location.

The flamingo eats upside down by lowering its neck into shallow waters. Since its upper beak is bigger than the lower one, the flamingo can better scoop up its food this way.

Of all land animals, not just birds, the ostrich's eyes are the biggest (approximately the size of a cue ball). This gives them very keen sight, allowing them to detect something moving 3.5 km away in the daylight.