Humming Birds

The humming bird hovers to drink nectar. Most birds just fly forwards but the humming bird even flies backwards. They can fly like this because their wings flap in figure eights. Their wings flap 100 times per second! There are 356 species of humming birds 51 of those birds are endangered. Regularly the birds have wing bones shaped as an arm but the humming bird has a wing bone shaped like a hand. It has to drink every ten minutes to stay in the air hovering. When it sleeps it sort of  hibernates it gets cold enough to get hypothermia it lays on its back and looks as if it is dead, this is called Torpor.