Monthly Home Range Size of Critically Endangered California Condors
Condors and vultures are the only terrestrial vertebrates that scavenge for all their food, and these birds move widely to locate unpredictable, patchily distributed food sources. USGS researchers and collaborators used high-resolution global positioning system (GPS) data to evaluate the home range of both wild- and captive-reared endangered California condors. They examined whether captive-reared birds’ characteristics and factors influenced their monthly home range size. Adult birds’ home ranges were larger than ranges of immature birds.