Black-headed Grosbeak Solstice Canyon Malibu Los Angeles California 034
“Black-headed Grosbeak parents fly south with worn feathers after breeding season. Their molting locations had been a mystery. The California scientists solved it with relatively inexpensive Global Positioning System (GPS) receiving devices.
They attached the 1-gm electronic devices to a leg of each grosbeak. The devices wake up every 2-6 weeks, record the GPS position and switch off. The GPS device, leg harness and leg bands weigh less than 2 g, or the equivalent of a long-distance runner carrying a laptop in a backpack. Each bird must be recaptured to download the data.” Topbirdingtours.com
Black-headed Grosbeak Solstice Canyon Malibu Los Angeles California 034
“Black-headed Grosbeak parents fly south with worn feathers after breeding season. Their molting locations had been a mystery. The California scientists solved it with relatively inexpensive Global Positioning System (GPS) receiving devices.
They attached the 1-gm electronic devices to a leg of each grosbeak. The devices wake up every 2-6 weeks, record the GPS position and switch off. The GPS device, leg harness and leg bands weigh less than 2 g, or the equivalent of a long-distance runner carrying a laptop in a backpack. Each bird must be recaptured to download the data.” Topbirdingtours.com