Extinction and extirpation
Extinction is the complete disappearance of a species from the earth. Extirpation is the complete disappearance (elimination) of a species from a given region, island, or area.
Hawaiian duck's future threatened by feral mallards [ More info] The greatest threat to the future of the Koloa maoli as a unique species is cross-breeding with the introduced Mallard duck. This type of threat is termed genetic extinction.
Online guide to the continental Cretaceous-Tertiary boundary in the Raton basin, Colorado and New Mexico [ More info] Field guide describing the geology and paleontology of the continental Cretaceous-Tertiary boundary in the Raton basin, Colorado and New Mexico.
Pacific Island Ecosystems Research Center [ More info] Geographical isolation of the Hawaiian Islands has resulted in the evolution of endemic species unique in the world. Research at the Center aims at preventing the further extinction of these species. Links to projects, publications and other data.
Alphabetical Index of Topics
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