Two new papers out this month in the Condor remotely track the migratory movements of nocturnal songbirds.
Buler and Dawson use the national network of weather surveillance radars (WSR-88D) to map high density stopover areas in the Northeastern the United States during fall 2008 and 2009. Further, they “developed statistical models that predict potentially important stopover sites across the region, based on land cover, ground elevation, and geographic location.”
Sanders and Mennill used acoustic monitoring of nocturnal flight calls produced by birds on the wing to quantify the magnitude of migration across the Great Lakes. ” A careful examination of 6 species with distinctive flight calls revealed only subtle seasonal differences between peak detections via acoustic monitoring and mist netting, at both daily and weekly timescales.”