For 28 years, the Xerces Society for Invertebrate Conservation has counted monarch overwinter populations along the ...

A state of Ohio report projects population loss in Northeast Ohio counties. If not addressed, it could have dire implications ...

Monarch butterflies in the western U.S. have dropped to just 9,119 this year. In 2023, the count was 233,394, meaning a 96% decline.

For a long time, researchers have sought to estimate the size of North America’s Indigenous population before European ...

Researchers analyzed thousands of ancient artifacts to track native American population changes in North America before ...

Researchers have directly linked population decline in polar bears living in Western Hudson Bay to shrinking sea ice caused by climate change.

This prolonged fasting drains polar bears’ energy reserves, reducing their ability to reproduce and raise cubs. Without ...

Scientists have quantified how much climate change has driven the population decline of polar bears living in Canada's Hudson ...

While budgets are annual exercises, they must account for long-term demographic trends that will shape future growth, jobs ...

A team of environmental scientists from the Instituto Nacional de Pesquisas da Amazônia, Michigan Technologic University and ...

The number of monarch butterflies in California is in sharp decline this year. This is the second-lowest population recording ...

The District’s population continued a three-year recovery in 2024, and topped 700,000 for the first time since 2019.