[1] Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA
[2] Univ Calif Berkeley, Museum Vertebrate Zool, Berkeley, CA 94720 USA
[3] Univ Melbourne, Sch Biosci, Parkville, Vic, Australia
[4] Michigan State Univ, Dept Integrat Biol & Ecol, Evolutionary Biol, E Lansing, MI 48824 USA
[5] Michigan State Univ, Behav Program, E Lansing, MI 48824 USA
[6] USGS, Wetland & Aquat Res Ctr, Gainesville, FL USA
[7] USGS, Patuxent Wildlife Res Ctr, Laurel, MD USA
[8] Swiss Ornithol Inst, Sempach, Switzerland