Hulk lizards are eliminating long-standing color types within their species, disrupting an evolutionary system that lasted ...

New research shows that variation in mating behaviours, parental care and differences in ornamentation of the sexes in bird ...

An international study of 261 bird species has found that demographic factors, particularly skewed adult sex ratios, drive differences in mating behavior, parental care, and ornamentation, rather than ...

Cooperation is a pillar of human society, promoting an exchange of skills and knowledge between different individuals and ...

Invasive cane toads in Japan evolved larger bodies in just decades, revealing how quickly animal traits can change in new ...

While the iconic honks, barks, and trills of pinnipeds — a family that includes seals, sea lions, and walruses — have echoed ...

Since classifications have existed, wall lizards have been known to exhibit a diversity of throat colors, a phenomenon that ...

The tiny blue-ringed octopus may seem ordinary in the ocean, but its size can be quite deceiving, as it theoretically has ...

A Journey Through the Natural History of Otters and Why They Matter by Heide Island, PhD, to be published on 4/28/26 by Avery ...

In nature, the ability to survive is usually determined by an organism’s speed, camouflage, and poison. However, one frog species is even more radical.

If forced to choose one descriptor for the octopus, the best word may be "otherworldly." These truly amazing marine animals ...