Tag: population

Elephant seals have had a spectacular journey from the brink of extinction, and they may owe it to a group of “supermoms” responsible for most of the reproduction. In a...

For decades, black vulture (Coragyps atratus) numbers have been on the rise in the United States. As their populations have grown and their range has expanded, conflicts with humans have...

Take a cruise from the equator to the poles and you might notice some important changes in marine ecosystem. Species diversity is greater in the tropics, and it dwindles as...

For Florida’s manatees, there’s good news and bad news. The good news: the state Fish and Wildlife Conservation Commission believes the population is much higher than previously estimated. New counts...

Why are monarch butterflies on the decline? “The migration itself might be the problem,” researcher Anurag Agrawal told the Washington Post. Agrawal is lead author on a paper in Science...

The Pacific marten (Martes caurina) is a mysterious little predator that lurks in remote slivers of dense forests in coastal Oregon and northern California. But researchers warn populations may vanish...

Waterfowl conservation is a unique realm of wildlife management, and now it has its own journal issue to highlight it. One hundred years after the Migratory Bird Treaty Act was...

After a decades-long recovery, California sea lions (Zalophus californianus) are dwindling again due to climate-driven reductions in prey, a recent long-term study shows. Centuries of human exploitation had once suppressed...

The toll of war isn’t limited to human casualties. Biologists recently found that since the mid-20th century, as conflict has become more common across Africa, mammal populations in turbulent areas...

A group of researchers is calling for “extreme care” in managing trophy hunting after finding that the harvest of males that hunters worldwide choose could contribute to extinction in some...