Tag: migration

After placing geolocators on prothonotary warblers (Protonotaria citrea) in a number of states, researchers found that wherever the birds depart from, most travel to northern Colombia for the winter. “This...

When either breeders or eager citizens raise monarch butterflies, they may be raising individuals that can’t migrate, according to new research. The idea to study the migration patterns of captive-bred...

Researchers are using radar to understand more about insect migrations. In southern England, scientists run a network of small radar stations that scan the sky 24 hours a day and...

When Marcus Drymon was conducting his usual shark surveys in the Gulf of Mexico in 2010, he wasn’t surprised to catch a small tiger shark (Galeocerdo cuvier). The surprise was...

Could the ways that songbirds prepare for their migrations apply to humans, too? Biologists at Penn State think so. “Imagine if you became morbidly obese before running a marathon, you...

As blackpoll warblers (Setophaga striata) start to return to the Great Lakes Basin on a stopover to Alaska and northern Canada, attention is turning to their wintering grounds in South...

Before the 1970s, where monarch butterflies overwintered was a mystery. Then researchers succeeded worked with Mexicans to trace the migration to the hills of Michoacan. In the video below, Atlas...

Over the last two decades, the number of monarch butterflies (Danaus plexippus) in North America has plummeted by approximately 90 percent — in part due to winter habitat loss in Mexico and increased...

Half-ounce songbirds, blackpoll warblers (Setophaga striata) redefine the meaning of endurance in their epic trip from the northwestern edge of Alaska to the East Coast before continuing on to Venezuela,...

Heavy desert rainfall has been keeping large swarms of painted lady (Vanessa cardui) butterflies in California, delaying their migration. These clouds of butterflies — likely numbering in the millions — in...