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An endothermic vertebrate that has feathers and a four-chambered heart, and lays eggs. Bird
A large feather that helps give shape to a bird's body. Contour Feather
A short, fluffy feather that traps heat and keeps a bird warm. Down Feather
A bird's internal storage pouch that allows it to store food inside its body after swallowing it. Crop
A muscular, thick-walled part of a bird's stomach that squeezes and grinds partially digested food. Gizzard
These have hallow bones, lightweight bills instead of teeth and wings for flight. Birds
These are the ONLY ANIMALS with FEATHERS. Birds
Flying uses a lot of energy so birds need a lot of this. Oxygen
Birds have many of these in additional to their lungs which help them hold more oxygen than any other animals breathing air. Air Sacs
This keeps birds oxygen righ blood separated from the oxygen poor blood. Four-Chambered Heart
Created by: laurenwvu