Mammals
This can be found covering a lot or a little of a mammals body
What is hair?
Birds reproduce by laying these
What are eggs?
Mammals have these that are needed to breathe air
What are lungs
These structures are unique to birds
What are feathers?
Mammals nurse their young with this liquid
What is milk
This is a bird that cannot fly
What is the ostrich, penguin, emu.
Amphibians can breathe using these two structures
What are lungs and gills?
These structures are hollow and lightweight, allowing easy flight for birds
What are bones?
The majority of Birds do not have these, but mammals have them to assist in eating
What are teeth?