About this Environmental Science article

Differential winter and breeding range shifts: Implications for avian migration distances by Shannon R. Curley; Lisa L. Manne; Richard R. Veit is a Environmental Science article available to read on EtoBox.

Aim: For many migratory avian species, winter and breeding habitats occur at geographically distinct locations. Disparate magnitudes and direction of shifts in wintering and breeding locations could lead to altered migration distances. We investigated how shifts in the centre of abundance (COA) of winter and breeding ranges have changed for 77 species of short-distance migratory birds. We addressed whether species tracked their historical average temperature and precipitation conditions at their winter and breeding COA, using data from 1990 to 2015. Location: North America. ## Methods: We calculated the COA for winter and breeding ranges from the National Audubon Society's Christmas Bird Count and the North American Breeding Bird Survey. We regressed the annual change in distance (km) between the two annual COAs of each species as a proxy for change in migration distance. We constructed a series of generalized linear mixed models (GLMMs) to evaluate changes in average temperature and precipitation at the wintering and breeding COAs. ## Results: Winter shifts in COA were predominantly northward. For most species, average temperature and precipitation that species experienced had not

Author

Shannon R. Curley; Lisa L. Manne; Richard R. Veit

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 1366-9516)

Published

2020

Language

EN

Field

Environmental Science (Physical Sciences)