ENDANGERMENT

Causes	Endangerment	Pleistocene Timing	Pleistocene Origin	101 Calendar
Historical Era	Birds Map	Mammals Map	References	358 Calendar

Endangered organisms receive varying levels and labels for the severity of their plight, depending on the categories of the labeling agency. However, the endangered organisms all bear high risk for total disappearance due to altered habitat, diminishing population, and increasingly unsuitable form.

At present, however, there is an ongoing acceleration of this process much exceeding the "geologic average" rates of extinction, and a relatively new environmental factor is largely responsible--humans. [BACK]

Endangered Examples map

The eight USA examples above illustrate a small variety of causes for endangerment.

Causes	Endangerment	Pleistocene Timing	Pleistocene Origin	101 Calendar
Historical Era	Birds Map	Mammals Map	References	358 Calendar

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Some other endangered species web sites:

USFWS	IUCN Red List	University of Michigan	Hawaii Ecosystems at Risk
US Endangered Species Act	CITES	IUCN Categories

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N. C. Heywood maintains this page, last updated 24OCT01.