Tag: overwintering

The western monarch butterfly population has been decreasing on its usual breeding grounds throughout the West. Last winter, overwintering numbers were the lowest ever recorded. But that may not mean...

Monarch butterflies (Danaus plexippus), which have been steeply declining throughout their range, showed a significant increase in their overwintering areas in Mexico, a World Wildlife Fund survey shows. The WWF...

Climate and land use changes are altering bat migration in Texas, researchers found. Studying the world’s largest migrant bat colony, they discovered that the bats are returning sooner after winter...

Monarch butterflies that overwinter on the West Coast of North America have declined from the millions 30 years ago to only 300,000 today, according to new research, raising concerns that...