Given the energetic effort required for migration, a device must weigh less than 5% of a bird's body weight, and many migratory songbirds weigh under 0.7 ounces (20 grams).

Every year, billions of birds undertake intrepid journeys between temperate regions in North America and their tropical wintering grounds in South America.

Radar data from Colombia reveals how tropical winds shape bird migration and pose new challenges for conservation.

Insights into birds' migration routes Date: July 21, 2014 Source: Wiley Summary: By tracking hybrids between songbird species, investigators have found that migration routes are under genetic ...

Mapping bird migration. Article by Lauren Bradford Photos courtesy of Kyle Horton October 07, 2020. New metric may redefine land management along migratory routes ...

For centuries, scientists have been working to unravel the many mysteries of bird migration, studying where birds go, how they find their way, and how much of the information they need is ...

Migration routes hold key to bird flu spread, global study finds. ScienceDaily . Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2016 / 10 / 161013155037.htm ...

Different bird species have different migration strategies, with some being more flexible than others to environmental changes, said Scott Loss, professor of natural resource ecology and ...

While you slept one night this week, an estimated 6.3 million migratory birds flew over Colorado at an average speed of 13 mph and an average altitude of 3,600 feet. And of those, 1.75 million of t… ...

Chicago is in the middle of the Mississippi Flyway, a round-trip bird migration route that sees over 300 bird species each year. Birds eat all day to save up nutrients and fat to make their long ...

With fall bird migration currently reaching peak numbers, live migration maps on the website BirdCast provide a real-time look as billions of birds wing their way south across the U.S. en route to ...

Birds migrate along ancient routes — here’s how scientists are studying their journeys Technology is providing new insights into bird migration, revealing that it is more complex than we ever knew ...