Bird t shirts

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Bird facts:

There are over 9,200 species of birds known from around the world and they can be found in just about every habitat.

The skeleton of birds and their internal organs are reduced in weight and size to make them lighter as an adaptation to flight. The bones are hollow and thin walled. Many organs that were paired in other vertebrates and in the birds ancestors, such as kidneys, are reduced to one in birds.

The egg of the hummingbird is the world's smallest bird's egg; the egg of the ostrich, the world's largest.

A bird's heart beats 400 times per minute while resting and up to 1000 beats per minute while flying.