| A | B |
| camouflage | blending in with the environment |
| hibernate | to go into a deep sleep |
| migrate | to travel from one place to another |
| nocturnal | animals sleep in the day and hunt at night |
| mimicry | when one living thing imitates another (ie. Viceroy butterfly looks like Monarch which tastes bad.) |
| thriving | organisms not in danger of dying out |
| threatened | a species that may become rare in the near future |
| endangered | when there are only a few living members of the species left |
| extinct | no members of a species left alive |
| fossils | the remains of an organism that lived long ago |