characteristics
What is hollow?
This unique characteristic of a birds skeleton makes it much lighter than others
All birds have?
large amount of oxygen.
Birds have __________ and other adaptations that allow for flight.
faethers, wings lightweight bones,
The bones of birds are unique because they __________.
contain cavities of air
I live in all climates year round and am the state bird of Maine and Massachusetts
Chickadee
What is endothermic or warm blooded?
This term describes a bird's ability to regulate its own body temperature
When a bird inhales, oxygenated air moves through the trachea into posterior?
air sacs
Birds have a _________.
four- chambe red heat
Feathers that cover the body, wings, and tail of a bird are called
contour feathers.
Feeding birds in the _________ is a bad idea because then they will become dependent on you as their food source
Winter
What are feathers?
Birds have these, which are acutally highly modified scales, no other type of animal does
When a bird exhales, deoxygenated air leaves the respiratory system and oxygenated ?
air is sent to the lungs.
Birds are ________, which means they generate body heat internally by their own metabolism.
endothermic
Contour feathers consist of a shaft with _______________by hooks.
barbs that are held together.
Mallard ducks live near marshes or _______
Ponds
What is 4?
A bird's heart is able to beat extremely rapidly and pump large amounts of blood due to the fact that it has this many chambers
All birds have internal
fertilization.
A high body temperature enables the cells in a bird’s flight muscles to use large amounts of ATP needed for
rapid muscle contraction during flight.
_____________ are soft feathers located beneath the contour feathers.
Down feathers
wood peckers live in the ________ where there are many trees for them to find food and live in
woods/ forest
What is calcium carbonate?
The eggs that birds lay are hard-shelled eggs due to the fact that each shell contains this chemical compound
After fertilization, the amniotic egg develops and is?
encased within a hard shell.
Large, powerful muscles attach to the ______ and keel.
sternum
The_________ secretes oil that adds a waterproof coating to the feathers.
The preen gland secretes oil that adds a waterproof coating to the feathers.
most birds _________ to other climates during the changing seasons
Migrate