| A | B |
|---|
| Camouflage | a protective coloration that allows some animals to blend in with their environment. |
| Counter-shading | a protective coloration in which the animal's back is dark while its underside is light. |
| Defense | a method of resisting attack. |
| Ejection | when an animal emits a fluid or object to ward off a predator. |
| External stimuli | stimuli that come from outside the body. |
| Grouping | a social behavior that occurs when certain animals travel together for defense (schools of fish, herds) to attack other animals (packs). |
| Mimicry | when a weaker animal copies a stronger animals' characteristics to warn off predators. |
| Panting | when some endothermic animals breathe heavily which increases air flow causing an increase in evaporation from the animal’s mouth and lungs, cooling the animal. |
| Seasonal camouflage | a protective coloration that is light in the winter and darker in the summer. |
| Shedding | when some endothermic animals form thick coats of fur or feathers to insulate their bodies from cold weather, then get rid of the thick coat during the summer, providing a cooling effect. |
| Shivering | when some endothermic animals have involuntary muscle movements that cause an increase in heat production. |
| Sweating | the secretion and evaporation of liquid from the skin that helps some endothermic animals stay cool |
| Warning coloration | a protective coloration (usually a bright color) that warns predators that they are poisonous. |
| Disruptive coloration | a protective coloration (usually stripes) that make it difficult for a predator to distinguish one animal from another when they are in a group. |
| Adaptation | a characteristic that helps an organism survive in its environment. |
