The most common definition of a species is that a species is a group of organisms that can successfully breed to produce fertile offspring. This is known as the biological species concept. This ...

Humans are having a highly detrimental impact on biodiversity worldwide. Not only is the number of species declining, but the ...

Uncontrolled livestock grazing is destroying streamside habitats that are critical to endangered plants and animals in ...

Understanding species of organisms requires that we have insight into the the evolutionary processes that cause biological diversity, and that we develop practical methods for species identification.

The idea that animals belong to different species if they cannot breed is known as the “biological species concept” and was proposed by the biologist Ernst Mayr. Today it is how many people ...

PHOENIX— Federal land managers have allowed years of extensive damage from livestock grazing to streamside habitats vital for ...

Climate change and invasive species will reduce habitat space for native fish and increase harmful interactions.

Buzzing insects may be seen as pests—but globally, hundreds of fly species migrate over long distances, with major benefits ...

The Center for Biological Diversity claims that without Endangered Species Act protections, the amphibians could become ...