birds Flashcards
what helped birds spread around world
flying
what is the great ancestor of birds called
Archaeopteryx (group of feathered dinosaurs)
what are the feathers on wings and tail of birds called
flying feathers
what is the key factor that enables birds to fly (beside wings)
hollow bones (they are super light)
where is the sebaceous gland located
above the tail
what influences the shape of birds beak
their food
what is the function of contour feathers
protection, body shaping
where are airsacks located and what is their function
attached to the bones, they store extra oxygen that gives birds more energy to fly
when is the birds breeding season
spring and summer
what makes bird egg shells hard
calcium
why are birds important for the economy
production of eggs, feathers, meat
