Ecology and physiology of en route nearctic-neotropical migratory birds: a call for collaboration

Product Type: Journal Article

Year: 2005

Author(s): Heglund, P.J., and S.K. Skagen

Pages: 193-196

Suggested Citation: Heglund, P.J., and S.K. Skagen. 2005. Ecology and physiology of en route nearctic-neotropical migratory birds: a call for collaboration. Condor 107(2): 193-196.

Abstract

Ornithologists who regularly witness the breathtaking influx of songbirds at stopover sites during spring or fall migration know that birds are tremendously adaptable. Migration encompasses a range of actions distinct from permanent residency but includes altitudinal movements, sporadic irruptions, short-distance flights, as well as obligate long-distance movements (Able 1991). Migration can be acquired, abandoned, or prolonged by a species depending on conditions along their migratory routes (Able and Beltoff 1998). Previously nonmigratory populations may undertake migration where changing conditions become increasingly disadvantageous for the resident population or where interspecific competition becomes more severe. Regardless of the distance or motivation, migration is physiologically demanding and potentially risky…