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amphibian

A cold blooded animal that lives in the water and breathes with its gills during its early life. It develops lungs and breathes air as an adult. Frogs, toads and salamanders are amphibians.

animal

A living being that is not a plant. Unlike plants, most animals move from place to place, having sense organs, and eat food rather than make it. Human beings, horses, fish and ants are all animals.

annelid

Any group of worm-like animals that are usually long, shaped like a tube and have a body made up of segments. Earthworms and leeches are annelids.

arachnid

A kind of arthropod, such as mites and ticks, that usually have four pairs of legs and a body that is divided into two regions.

arthropod

Any group of animals, such as spiders and lobsters, that have jointed legs and a body made up of segments.

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bird

A warm-blooded animal that lays eggs and has two wings and a body covered with feathers.

birdbaths

A round bowl filled with water for birds to drink and bathe in.

blubber

A thick layer of fat under the skin of certain sea animals, such as seals and whales.

bog

Soft, water soaked ground; marsh

burrow

A hole dug in the ground by a small animal, such as a rabbit or a mole.

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camouflage

The disguise of people, animals or things, especially in order to make them look like what is around them.

canyon

A deep valley with steep walls on both sides that was formed by running water; gorge

carnivore

Feeding on the flesh of animals.

city park

Many people live close to one another in a city and the park is an area of land used for recreation.

crustacean

Any group of animals that live mostly in water and have a hard outer covering. Lobsters, crabs and shrimps are crustaceans.

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elderberries

Small purplish-black fruit which are safe to eat. Elderberries are sometimes used to make wine or jellies.

endangered

To expose to danger; threaten: The oil spill endangered hundreds of birds.

estuaries

An arm of the sea that extends inland to meet the mouth of a river.

evergreens

Having leaves or needles that stay green all year; Pines, firs and hollies are evergreen trees.

extinct

No longer existing in living form.

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forest

A dense growth of trees covering a large area.

fungus

Any of a group of plantlike living things that have no flowers and leaves and no green coloring. Mushrooms, mold and mildew are fungi.

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grubs

The thick, worm-like larva of certain beetles and other insects.

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habitat

A place where an animal or plant naturally lives and grows.

hatch

To come or cause to come out of an egg or eggs.

herbivore

An animal that feeds chiefly on plants.

hibernate

To spend the winter in a state of rest resembling sleep.

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insect

Any of a large group of animals that have six legs, a body with three main divisions and usually wings. Flies, bees, grasshoppers, butterflies and moths are insects.

insectivore

An organism that feeds mainly on insects.

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larvae

The plural of larva. Larva are the wingless, often wormlike form of a newly hatched insect. Caterpillars and grubs are insect larvae.

lichen

A plant that consists of a fungus and a kind of algae growing together. Lichens form a scaly or branching growth on rocks and trees.

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mammal

A warm-blooded animal, such as a human being, cat or whale, that has a backbone and usually some hair or fur on its body. Mammals produce milk for feeding their young.

marshes

Low, wet-land; swamp

marsupial

An animal, such as a kangaroo or an opossum, that carries its newborn young in a pouch outside the mother’s body.

meadows

An area of grassy ground, as one used in a pasture.

migrate

To move from one country or region and settle in another.

mollusk

Any of a large group of animals, such as clams or snails, that usually live in water and have a hard outer shell.

moss

Any of a group of small green plants that do not produce flowers and that often form a dense growth on damp ground, rocks or tree trunks.

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native

An animal or a plant that originated in a particular place or region.

nectar

A sweet liquid found in many flowers. Bees gather nectar to make honey.

nests

A container or shelter made by birds for holding their eggs and raising their young.

nocturnal

Of or happening at night.

nymphs

Graceful, legendary female spirit or goddess that lives in the woods or in the water.

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obnoxious

Extremely unpleasant or offensive.

omnivore

Eating both animal and vegetable foods.

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parasites

A plant or animal that lives in or on a different kind of plant or animal and gets its food from that plant or animal.

pastures

Plants eaten by grazing animals.

pine

An evergreen tree that has cones, leaves that look like needles, and wood used for lumber.

piscivore

An animal that feeds chiefly on fish.

poisonous

Containing or having the effects like that of poison.

poisons

A substance that, when swallowed or breathed, causes injury, sickness, or death, especially by chemical means.

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pollen

Tiny, usually yellow grains that fertilize the female cells of a plant to produce seeds. Some pollens cause allergies.

population

The people, plants, or animals living in a certain place,

predators

An animal that lives by preying on other animals.

prey

An animal hunted or caught by another for food.

provoked

To bring on; cause

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reproduce

To produce offspring.

reptile

Any of a group of cold-blooded animals that creep or crawl on the ground. Reptiles have backbones and are usually covered with scaly skin. Snakes, turtles, and lizards are reptiles.

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scavenge

To feed on dead or decaying matter.

sedge

Any number of grasslike plants that have solid stems and leaves that grow in three rows.

soil

The loose top layer of the earth’s surface in which plant life can grow.

species

A group of animals or plants that are similar and are able to mate and have offspring.

spruce

An evergreen tree with short needles, drooping cones, and soft wood often used for paper pulp.

suburbs

A town or district that is close to a city.

swamps

An area of spongy, muddy land that is often filled with water.

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vibration

Rapid movement back and forth.

wetlands

A lowland area, such as a marsh or swamp, that is soaked with moisture, and is often looked at as the natural habitat of wildlife.

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American Heritage ® Children's Dictionary
Copyright © Houghton Mifflin / Dorling Kindersley Direct
September 1996