beautiful birds footage,relaxing video

https://www.youtube.com/channel/UCm1PS7o2U39LnOZdhDuoE-Q
Birds, members of the class Aves, include more than 10,400 living species. Their feathers distinguish them from all other classes of animal; no other animals on earth have them. If you see an animal with feathers, it’s undoubtedly a bird. Like mammals, birds are warm-blooded vertebrates with four-chambered hearts. However, they are more closely related to reptiles and are believed to have evolved from dinosaurs. Their forelimbs have been modified into wings over many millions of years of evolution, they lay hard-shelled eggs and they have exceptional vision – the most acute of their senses. Most birds are diurnal, meaning they sleep at night. Most can fly, but flightless species exist.