First Day Cover Postcard Bird Tchintchinxolo Thomasophantes Sanctithomae 1983 Wildlife which became the world's first

which became the world's first mass-produced helicopter in 1942

He built the world's first electric elevator in 1880

The giant panda is a conservation-reliant vulnerable species

Oswald the Lucky Rabbit

First Day Cover Postcard Bird Tchintchinxolo Thomasophantes Sanctithomae 1983 Wildlife which became the world's firstFirst Day Cover Postcard Bird Tchintchinxolo Thomasophantes Sanctithomae 1983 Birds are a group of warm blooded vertebrates constituting the class Aves, characterized by feathers, toothless beaked jaws, the laying of hard shelled eggs, a high metabolic rate, a four chambered heart, and a strong yet lightweight skeleton. Birds live worldwide and range in size from the 5 cm (2 in) bee hummingbird to the 2. 75 m (9 ft) ostrich. There are about ten