Sticking with a long-term life partner to rear children has long been considered a dominant mating pattern for our species, ...

When related animals produce offspring, the young can be affected by physical abnormalities and health problems. We explain why.

Research into wood warblers shows that gene sharing across species played a key role in shaping their bright feather colors.

Scientists have found a new orange toad species in Brazil that is so small it fits on the tip of a pencil, highlighting the ...

The sex of many turtles, crocodilians, and other reptiles is determined by the temperature at which their eggs incubate.

White undersides on a gray squirrel have an evolutionary purpose, but all-white squirrels go on acting the same as gray ones ...

Now scientists have formally described it as a new species: Brachycephalus lulai, a pumpkin toadlet found only in a small ...

Wondering what owling is? Discover when to go, where to look, which owls you might see, and how to enjoy owling the right way.

When Bald Eagles pair up, they take the plunge—literally—locking talons high in the air and tumbling toward the ground, ...

The monogamy rate in humans may be higher than you expected... but we do it in a strange way compared to other animals.

During the summer months, the voles are largely solitary. However, throughout the long, harsh winters, they form small ...

The young, male wolf identified as gray wolf 2403 had wandered from Pitkin County, Colorado, into New Mexico, likely looking ...