Neotropical Migrants Exhibit Variable Body-Size Changes Over Time and Space

摘要: Abstract Recent changes in the Earth's climate have been linked to phenology, geographic distributions, and morphology of species, warming temperatures associated with change predicted result decreases avian body sizes. We examined wing length fat-free mass 34,844 fall migrants from 31 neotropical migratory species captured at Patuxent Wildlife Research Center Maryland between 1980 2012. Body size varied across but increased significantly over time pooled sample all species. Magnitudes were small similar other studies, mean increasing 0.55% 1.30% General morphological our site differed those a banding station located 235 km away. Across weakly correlated stations, uncorrelated. Populations some spe...