3. Characteristics
-warm blooded
-vertebrates
-breathe using lungs
-an outer covering of feathers - this feature is not shared with
any other vertebrate group
-reproduce by laying eggs
4. How to know its a bird
All birds have wings, but not all birds fly: generally, there
is reduction of skeletal weight
5. -Birds have beaks or bills, and do not have teeth
6. -Birds have two legs
7. - Birds have a cloaca, a cavity into which the intestinal,
urinary, and genital canals empty
8. -Birds have nucleated red blood cells, unlike mammals
9. -Chambered heart
Functions
-Digestive can eat20 % of its body weight. And does about the same
routine as a human.
-Respitory it differs from actual mammals because birds lack a
diaphragm and they dont breath as we do.
-Reproduction- girls 1 functionalovary (left one)
Boystestes grow larger to produce sperm duringbreading
season.
10. Adaptations
They adapt with their
-beaks depends what they are
-feet depends on what bird