* Mammals
* Have fur
* Warm-blooded
* Give birth to live young
* Nurse their young with milk
* Have wings and can fly
* Nocturnal (active at night)
* Eat insects, fruit, or nectar
* Found all over the world
Whale
* Mammals
* Have blubber
* Warm-blooded
* Give birth to live young
* Nurse their young with milk
* Have fins and can swim
* Aquatic (live in water)
* Eat krill, fish, or squid
* Found in all oceans