2007Wild Ducks and Geese - First Day Cover

Romfilatelia, the company specialized in editing and trading Romanian postage stamps, introduces into circulation the philatelic issue Wild Ducks and Geese.

The birds (Aves class) represent a group of tetrapod vertebrates which have evolved from reptiles, while keeping some features of these animals. They are the first vertebrates which have the possibility of preserving a constant body temperature. The most important characteristic of birds is their flight adaptability. By virtue of this fact, the birds are the most widespread species in the world, breaking down the geographical barriers, traveling on large distances, conquering lands with a harsh climate. The winter and summer migration is widespread with several birds species.