American Black Duck

Cornell’s All About Birds

Western Regional Park
August 29, 2007
Photo by Bill Hill

Daniels (PVSP)
February 25, 2009
Photo by Jeff Culler

Wilde Lake
December 18, 2010
Photo by Jeff Friedhoffer

While not necessary for common species, it is good to get into the habit of including photographs and recordings/spectrographs so that you do it for uncommon species that require more documentation.