The Arizona Department of Game and Fish announced Mount Graham red squirrels are thriving in an southeastern Arizona mountain ...

Native to the Arctic region, reindeer are one of the staples for the survival of arctic people, used for transportation, food ...

The globalization of the earth is contributing to the introduction of many animal and plant species into new parts of the ...

which is native only to the Pinaleño Mountains in southeastern Arizona. That brought the total population of the unique red squirrels to about 233 animals, a 60% increase since the previous year.

Non-native species introduced by humans are among the main causes of global species decline—they were partly responsible for 60% of the species that have become extinct worldwide in recent decades.

The U.S. Fish and Wildlife Service proposed on Thursday to list the eastern hellbender, a type of salamander in Tennessee and ...