Glossary

e
Echolocation - 

A means by which bats and certain other animals can find their way, find food, or avoid obstacles by emitting a series of sounds, often inaudible to humans, which echo back from an object and are received by the ear.

Ecology - 

The study of animals, plants, and their environmentEverything that surrounds an animal or other living thing. For example, a pond is a frog's environment. (the world around them).

Ecosystem - 

All living things depending on one another to survive in a certain area.

Ecotourism - 

Ecologically sensitive travel that combines the pleasures of discovering and understanding floraAll the plants in a particular place or period of time. and faunaAll the animals in a particular place or period of time. with opportunities to contribute to their protection.

Ectotherm/Ectothermic - 

A cold-bloodedAn animal whose body temperature changes with the temperature of the air or water around it, as a turtle or fish. animalAny living thing that is not a plant. Most animals can move about freely. All use plants or other animals as food. All have sensory organs.; that is, an animalAny living thing that is not a plant. Most animals can move about freely. All use plants or other animals as food. All have sensory organs. whose body temperature varies with the temperature of its surroundings. Ectotherms cannot produce their own body heat./To be an ectotherm.

Egg tooth - 

A hard, sharp prominence on the tip of the beakThe hard mouthpart of a bird and some other animals. The beak can also be called a bill. of baby birds and reptiles with which they break through the eggshell.

Emergent layer - 

Widely scattered tall trees that break through the canopyThe second-highest, spreading, branchy layer of trees in a rain forest. of a tropical rain forestA woodland that receives more than 100 inches (250 centimeters) of rain each year. Tropical rain forests are known for warm temperatures, and have evergreen trees that form a dense, continuous canopy. Temperate rain forests have evergreen and deciduous trees, with temperatures that vary greatly with the season..

Enclosure - 

A space in a zoo where animals live and are cared for.

Endangered - 

Animals or plants that survive in such low numbers that they could become extinct in a few years unless something is done to help the populations increase.

Endotherm - 

A warm-bloodedAn animal whose body temperature stays fairly constant, no matter what the temperature of the air around it. animalAny living thing that is not a plant. Most animals can move about freely. All use plants or other animals as food. All have sensory organs.; that is, an animalAny living thing that is not a plant. Most animals can move about freely. All use plants or other animals as food. All have sensory organs. that maintains its body temperature at a relatively constant level regardless of the temperature of the environmentEverything that surrounds an animal or other living thing. For example, a pond is a frog's environment..

Enrichment - 

EnrichmentEnrichment is an important part of animal care. It is made up of the many ways in which keepers provide zoo animals with opportunities to do something with their time, giving the animal mental stimulation and physical exercise. Enrichment also gives animals choices and some control over their environment. is an important part of animalAny living thing that is not a plant. Most animals can move about freely. All use plants or other animals as food. All have sensory organs. care. It is made up of the many ways in which keepers provide zoo animals with opportunities to do something with their time, giving the animalAny living thing that is not a plant. Most animals can move about freely. All use plants or other animals as food. All have sensory organs. mental stimulation and physical exercise. EnrichmentEnrichment is an important part of animal care. It is made up of the many ways in which keepers provide zoo animals with opportunities to do something with their time, giving the animal mental stimulation and physical exercise. Enrichment also gives animals choices and some control over their environment. also gives animals choices and some control over their environmentEverything that surrounds an animal or other living thing. For example, a pond is a frog's environment..

Environment - 

Everything that surrounds an animalAny living thing that is not a plant. Most animals can move about freely. All use plants or other animals as food. All have sensory organs. or other living thing. For example, a pond is a frog's environmentEverything that surrounds an animal or other living thing. For example, a pond is a frog's environment..

Environmental indicator species - 

An animalAny living thing that is not a plant. Most animals can move about freely. All use plants or other animals as food. All have sensory organs. or plantAny living thing that is not an animal. Plants live on sunlight and water instead of food. Plants generally cannot move on their own, and are not able to smell, hear, see, or touch. that is monitored to determine the health of an entire ecosystemAll living things depending on one another to survive in a certain area..

Erosion - 

Soil being washed away, usually by wind or water and after vegetation has been removed.

Estivation - 

A sleepy or dormant state caused by hot, dry, summer conditions.

Estrus (cycle) - 

The rhythmic changes in the mammalian female that enable her to become pregnant.

Ethogram - 

An exact catalog of all behaviorIn biology, an organism's activity in response to its environment. The study of animal behavior is called ethology. patterns occurring in a speciesA group of individuals that have many of the same characteristics, and are different from all other animals in some important way. Hamsters and mice are two different species of rodent., including the vocal patterns.

Ethology - 

The science and study of animalAny living thing that is not a plant. Most animals can move about freely. All use plants or other animals as food. All have sensory organs. behaviorIn biology, an organism's activity in response to its environment. The study of animal behavior is called ethology..

Evaporation - 

Liquid water turning into gas vapor.

Evolve/Evolution - 

A very slow growth or change.

Ex situ - 

In captivityThe maintenance of animals not in the free, wild state..

Exoskeleton - 

Meaning outside skeleton, it refers to certain animals' hard outer bodies. For example, many insects have a hard skin called an exoskeletonMeaning outside skeleton, it refers to certain animals' hard outer bodies. For example, many insects have a hard skin called an exoskeleton. The exoskeleton does not grow; it must be molted. Crabs, lobsters, and tarantulas have exoskeletons, too.. The exoskeletonMeaning outside skeleton, it refers to certain animals' hard outer bodies. For example, many insects have a hard skin called an exoskeleton. The exoskeleton does not grow; it must be molted. Crabs, lobsters, and tarantulas have exoskeletons, too. does not grow; it must be molted. Crabs, lobsters, and tarantulas have exoskeletons, too.

Exotic - 

Foreign to a particular place, from another part of the world; not indigenousNaturally occurring in a particular place (area or country)..

Extinct/Extinction - 

No longer existing. For example, dinosaurs are extinct./The process of becoming extinct.

Extirpated - 

Refers to a speciesA group of individuals that have many of the same characteristics, and are different from all other animals in some important way. Hamsters and mice are two different species of rodent. that is extinct in a certain area. For example, the elk was extirpatedRefers to a species that is extinct in a certain area. For example, the elk was extirpated from Wisconsin in the late 1800s. from Wisconsin in the late 1800s.