King penguins are adapting to climate change in a way that seems to help them breed successfully, which is unusual.

We visited a tropical fish breeding flea market packed with koi, cichlids, discus, and more. Local breeders brought out some incredible specimens, from vibrant discus to high quality koi. Tank setups, ...

A new study reveals that behavioral isolation between populations of Bahamas mosquitofish is driven primarily by the actions of females—not just through mating choice behaviors, but also through ...

Unlike most parrots, the kākāpō lives on the ground and moves mainly at night. It uses strong legs to climb trees and relies on balance rather than flight to descend. Adults are among the largest ...

A new study shows that as humpback whale populations recover from past whaling, older males are gaining a major advantage in reproduction. Early in the recovery, breeding groups were dominated by ...

Two condors in far northwestern California appear to be caring for a recently laid egg, a historic moment in an effort to bring the massive raptors back to the Yurok Tribe's historic homeland.

As humpback whales recover, older males are fathering more calves, revealing how whaling still shapes mating and competition ...

Across the animal kingdom, sound is more than communication—it's a signal of survival and success. From birds and primates to insects, fish, and amphibians, animals broadcast acoustic "advertisements" ...

The Florida panther, one of the Sunshine State’s most iconic and endangered animals, is in one of the most sensitive and biologically active periods of its yearly cycle this month. As breeding ...

related to environmental variation. To understand the adaptive value of cooperative breeding behavior in variable environments, researchers must consider both mean and environmentally induced variance ...

Few animals depend on timing as tightly as the kākāpō. This flightless parrot is found only on a few predator-free islands off the southern coast of New Zealand. It breeds only when specific forest ...