Science ❯Ecology ❯Population Dynamics

Species Decline

Butterflies Tropical Ecosystems Tropical Birds Monarch Butterfly Monarch Butterfly Population Urban Wildlife Conservation Efforts Chinook Salmon Endangered Species Reindeer Marine Species Blue-winged Teal Population

Reindeer Populations Face Up to 58% Decline by 2100, Study Finds

Global numbers have already dipped by nearly two thirds over the past 30 years, reflecting rapid Arctic warming.

Heat Waves From Climate Change Caused Up to 38% Decline in Tropical Bird Populations

Century of Data Shows Native Declines and Invasive Boom in Wadden Sea

Harbour Porpoises in German Baltic Face Alarming Population Decline

California Halts Commercial Salmon Fishing for Third Year Due to Population Crisis

California Faces Potential Third Consecutive Salmon Fishing Ban

Winter Bird Count Reveals Decline in Common Species Across Germany

Monarch Butterflies Proposed for Threatened Species Listing in U.S.

Record-Low Butterfly Numbers Prompt 'Nature Emergency' Call