Purple martin migration behavior perplexes researchers

Purple martins will soon migrate south for their usual wintertime retreat, but this time the birds will be wearing what look like little backpacks, as scientists plan to track their roosting sites along the way.

Songbirds fly 3 times faster than expected (Video)

A York University researcher has tracked the migration of songbirds by outfitting them with tiny geolocator backpacks - a world first - revealing that scientists have underestimated their flight performance dramatically.