Mammals
This characteristic is usually found all over their bodies. You have this characteristic on your head.
What is hair?
These animals give birth to live young; therefore, these are part of this group.
What are mammals?
Instead of giving birth to live young, birds' young come from these.
What are eggs?
What is cold-blooded?
The unique thing about amphibians is that they spend the first part of their lives in the water using these to breathe.
What are gills?
They feed this to their young.
What is milk?
A newly-born baby is called this.
What is a joey?
Birds have these claw-like feet that allows them to catch and kill their prey.
Instead of breathing through lungs, fish breathe through these.
What are gills?
After their bodies change, amphibians develop these allowing them to breathe air.
What are lungs?
What are lungs?
Kangaroos are generally nocturnal, meaning they are active at this part of the day.
What is night?
What are flightless birds?
This tiny creature may not even seem like a fish, but is cold-blooded, has fins, scales and gills, and lays eggs like other fish.
What is a seahorse?
This word describes the life cycle, or change, amphibians go through. Insects are known to go through this process, too.
What is metamorphosis?
They have this particular structure inside their bodies.
What is a vertebrate?
This is the only marsuipal known to live in North America.
What is the opossum?
Birds' digestive systems works quickly and they do not have teeth. This organ is very rough inside and grinds up the food.
Fish were designed with several different kinds of these to help them be great swimmers.
What are fins?
Reptiles are vertebrates with this kind of dry skin.
What are scales?
This means that their bodies stay about the same temperature regardless of the air around them.
What is warm-blooded?
All kangaroos have these that help them keep their balance.
What is a tail?
This process is when a feather gets pulled apart and the bird can zip it back up with its beak.
What is preening?
To stay afloat, most fish have these: a balloon-like sac that can be inflated with air to help the fish rise in the water, or can be deflated to help the fish sink or go deeper in the water.
What are swim bladders?
The four major groups of reptiles are lizards, turtles, crocodiles, and these.
What are snakes?