Extinct Mammal A species that is gone forever because all of its kind have died An animal that has fur or hair, breathes with lungs, gives live birth and is fed milk from its mother Species A name that identifies a living organism Bird An animal that has feathers, two legs and wings In danger of becoming extinct Endangered Amphibian An animal that begins life in the water and moves to the land as an adult Threatened Gills On the way to becoming endangered or extinct A body part found in fish and young amphibians that takes oxygen from the water Cell The small unit that makes up all living things Inherit To receive traits from your parents Fossil Evidence of a plant or animal that lived on Earth long ago Trait A body feature that an animal inherits; it can also be something that an animal does Fish An animal that lives its whole life in the water and breathes with gills Hibernate To enter a deep sleep in which life activities slow down Migrate To travel as a group from one place to live in another Scales Reptile The small, thin, flat plates that help protect the bodies of fish and reptiles A land animal that has dry skin covered by scales Camouflage A natural disguise some animals have to help them blend in with their surroundings Instinct A behavior an animal knows how to do without being taught Mimicry The imitation by one animal of another or an object in order to avoid predators Omnivore An animal that eats both plants and animals Food Web A model that shows how food chains overlap Decomposer A living thing that breaks down dead organisms for food Predator An animal that hunts another animal for food Food Chain The path of food from one living thing to another Prey An animal that is hunted by a predator Energy Pyramid A diagram that shows that the amount of useable energy in an ecosystem is less for each higher animal in the food chain Producer A living thing that makes its own food Consumer A living thing that eats other living things as food Herbivore Interact Carnivore An animal that eats plants When plants and animals affect one another or the environment to meet their needs An animal that eats other animals