Dickcissel Night Flights | Home | 2008 Challenge Award
Spring 2000 | Spring 2001 | Spring 2002 | Spring 2003 | Spring 2004 | Spring 2005
Night Flight Call Monitoring
Dickcissels are small, songbirds that winter in Venezuela and breed in central North America. They make their migrations between these regions, mostly at night, giving short buzzy flight calls to maintain contact with one another in the darkness.
Millions of Dickcissels fly across the Rio Grande River from Mexico into south Texas each spring. Automated acoustic recording stations located at high schools across the Rio Grande Valley of south Texas recorded the number of Dickcissel call notes over the schools at night every spring from 2000-2004. Monitoring continued at Laguna Atascosa National Wildlife Refuge in spring 2005.