Researchers at the University of Copenhagen have found that the critically endangered regent honeyeater faces hidden genetic ...

U.S. bird populations are experiencing alarming declines due to factors such as habitat loss and climate change, according to a new report identifying 112 species that have reached a "tipping point," ...

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

"The picture ... Some populations have stabilised or even expanded thanks to conservation efforts and the reintroduction of species, the report said. The European bison, for example, disappeared ...

The evidence is pieced together from details drawn from all over the world, but it adds up to a disturbing picture ... know that many more species are "living dead" -- populations so critically ...

STOCK IMAGE/Getty Images Total butterfly abundance ... Monarch butterflies, for instance, are one example of a thriving species. The population of monarch butterflies nearly doubled in population ...

The various Ensatina salamanders of the Pacific coast all descended from a common ancestral population ... A well-studied example of a ring species is the salamander Ensatina escholtzii of ...

Populations are groups of organisms of the same species living in the same area ... changes in population sizes and growth rates. For example, fisheries scientists know that some salmon ...

Fluctuations in population ... mutualistic species vary with the density of another mutualistic species (Holland et al. 2002, Thompson et al. 2006, Holland & DeAngelis 2010). For example, as ...

The world’s biodiversity is declining at an alarming rate. Population sizes of vertebrate species measured by the Living Planet Index (LPI) have more than halved in little more than 40 years. The LPI, ...

Current population growth trends indicate that the number of threatened species will increase by 7 percent over the next 20 years and 14 percent by 2050. And that’s without the addition of global ...

Many US Bird Species Seen as Reaching Population 'Tipping Point' By Will ... and egrets that show some increases," Parr added. Some examples of common birds now in decline include the chimney ...