Wood Stork Migration
Not a true migrant; movements appear to be response to local environmental conditions: Moves from areas with poor food supply to areas with better feeding conditions. Exhibits 2 types of movement: (1) Displays extensive dispersal after breeding season, followed by movement south in late fall and early winter into Florida. (2) After large nesting failures or when no nesting is initiated, because of poor foraging conditions in s. Florida, many storks move north prior to beginning of summer rainy season. In latter situation, adults and immature birds depart, leaving young in nest to die or follow later (JCO).
No known migration over Caribbean; breeding populations on Cuba and Hispaniola are presumably resident. Storks use thermals for soaring flight for long-distance movements. Lack of thermals over water may restrict southern movement from Florida and movement among islands in Caribbean.
Little known about movements of populations in Mexico and Central and South America. Large numbers nesting during annual dry seasons in Llanos of Venezuela and Usumacinta wetlands of s. Mexico disappear from these regions during rainy seasons (B. Thomas pers. comm., JCO). Other populations probably exhibit postbreeding dispersal, but this is largely undocumented.
Thanks for stopping by,