Wolves in Yellowstone National Park have experienced a 27% decline in population in 2025.

Are box turtles in worse shape than herpetologists thought? University of Toledo researchers raise the question in new ...

Koalas suffered a massive population decline that left them with dangerously low genetic diversity. However, new genomic research suggests their rapid rebound may be helping reverse some of that ...

Add Yahoo as a preferred source to see more of our stories on Google. New Mexico was one of five states in the U.S. that lost population last year as the U.S. growth rate dramatically slowed. While ...

Depopulation — unremitting, long-term population decline — promises to be the 21st century’s most important demographic trend. After centuries of seemingly unstoppable increase, world population is on ...

In North America, bird populations are declining at rapid rates in three specific locations. Between 1987 and 2021, wild bird numbers have fallen in California, the Midwest, and the Mid-Atlantic.

SAN FRANCISCO (KGO) -- There's a concerning trend in the Bay Area: bird populations are declining at an alarming rate. The latest report by the San Francisco Bay Joint Venture and Point Blue ...

A declining population can wreak havoc on a country whose various social programs are based on growing numbers of citizens. For instance, the Social Security system in the U.S., and similar ones in ...

The Philadelphia region's immigrant population has increased over the last decade, spurring economic growth and social prosperity, a new report says. The report from The Welcoming Center says this ...