A lot has changed in the world since the Endangered Species Act (ESA) was enacted 50 years ago in December 1973.

Insect decline is being driven by losses among the locally more common species, according to a new study published in Nature. 

Toxic chemicals produced from oil emissions and wildfire smoke have been found in muscle and liver samples from Southern Resident killer whales and Bigg’s killer whales.

Humans have wiped out around 1,400 bird species – twice as many as previously thought – with major implications for the ongoing biodiversity crisis, a new study has found.

A new method could be used by biologists to estimate the prevalence of disease in free-ranging wildlife and help determine how many samples are needed to detect a disease.

Pipistrelle bats have a magnetic compass and calibrate it at sunset, according to a new study published in the journal Biology Letters. 

In a first-of-its-kind study of aardvarks, Oregon State University researchers spent months in sub-Saharan Africa collecting poop from the animal and concluded that aridification of the landscape is isolating them, which they say could have implications for their long-term survival.

In the frigid seas halfway between mainland Norway and the North Pole, two types of animals browse the palatable vegetation of a high-tundra archipelago, munching on thick moss, cropped grasses and low-lying shrubs. 

Manatees are endangered species volatile to the environment.  

The Red List status of the Saiga antelope has been changed from Critically Endangered to Near Threatened, thanks to effective national and international conservation efforts.