an endothermic vertebrate that has feathers and a four chambered heart, and lays eggs
one of the largest feathers that give shape to a bird's body
contour feathers are also called...
specialized feathers that are specialized to trap heat and keep the bird warm
a material that does not conduct heat well and therefore helps prevent it from escaping
an internal storage tank that allows birds to store food
part of the stomach that squeezes and grinds food into a paste, acts like teeth
helps supply the bird with enough oxygen
are birds ectotherms or endotherms?
what allows birds to extract more oxygen from each breath than other animals?
how many chambers does a bird heart have?
how do birds react so quickly?
because of their well developed brain and fine sense of sight and hearing
what type of fertilization do birds have?
birds are decendents from....
how do bird eggs differ from reptile eggs?
bird eggs will only develop at a temperature close to the body temp of the parent bird
whta adaptations help birds live in widely diverse environments?
leg shape, claws, and bills
what type of legs do wading birds like cranes have
long legs and toes
what type of toes do perching birds have
toes that can lock onto branches
why are birds important?
provide food, stuffing for clothing, helping flowers reproduce, eat pest animals
the difference in pressure above and below the birds wings thta produces an upward force that causes the wings to rise
why do birds swallow stones?
to help grind up their food