The ostrich, often called the "dinosaur bird," has eyes that are bigger than its brain. Ostriches also have the largest eye of any animal on Earth, with an eye that measures about 2 inches in diameter. More »

The largest animal ever known to exist is Balaenoptera musculus, commonly known as the blue whale. The blue whale is larger than any dinosaur discovered so far. More »

www.reference.com Science Biology Zoology

One pupil can be larger than the other because of an underlying issue, such as syphilis, stroke, brain aneurysm, multiple sclerosis and optical nerve tumor. The use of illicit drugs can also trigger this change, as state... More »

To catch an escaped bird, act quickly to visually locate the bird. Next, place its cage near the area where it escaped, and place bird food or treats inside the cage. Then call the bird to see if it will come to you. More »

www.reference.com Pets & Animals Birds

The only bird that can fly backward is the hummingbird. Hummingbirds have a special ball-in-joint shoulder socket that enables them to fly backwards, upside down and upright because it can be rotated 180 degrees. Humming... More »

The name of a young bird varies by species, so there is no truly unifying term to describe all young birds except in a generic sense. If this is the aim, such terms as nestling, fledgling, hatchling and chick can be appl... More »

A female bird is commonly referred to as a hen. All hens develop ovaries when it's breeding season. When breeding season is over, the ovaries become smaller. More »