The Birds

Birds (Latin, Spanish, Portuguese, Italian: Ave, German: Vogel, English: Bird, French: Oiseau) Although there are some insects and fans of bats, birds have feathers only. There are approximately 10000 species of birds in the world. In general, all living birds belong to the Neurithic group. Birds of the class (Aves) have been organized into 23 classes, 142 species, 2057 masses, and 9702 species. [2] However, new species are constantly being discovered and new species are identified by dividing older species. Fossils available so far indicate that the birds appeared in the Jurassic period, about 16 million years ago. According to paleontologists, after the extinction of Cretaceous-Palaeogene half-a-million years ago, birds were the only descendents of the four-colored dinosaurs. Among the living birds, Moe Hummingbird is the smallest (only 5 centimeters or 2 inches) and ostrich is the largest (2.75 meters or 9 feet).