Fig. 5. Illustration of the complexities of bird migration, when information on connectivity of areas is considered, even within a single species. Here, U.S. Bird Banding Laboratory data on banding and recovery events in breeding and winter seasons of Greater White-fronted Geese (Anser albifrons) are plotted on a map of North America. Records, i.e., lines connecting breeding and wintering records corresponding to banding and recovery of a single individual, not intended to reflect migratory routes, from particular areas of the breeding range are highlighted in different colors. Note that a significant portion of the blue lines also stops along the Pacific coast of North America, coincident with the winter destination of the red lines, and that none of the red lines extends farther east than the west coast.