|Black throated blue warbler. Source: Wiki Commons / mdf|
Landscape ecologists Stephen Matthews and Paul Rodewald of the Ohio State University found that even a small patch of urban trees, like a hectare-large arboretum, provides valuable stopover habitat for migratory birds, though the authors noted that larger, contiguous patches of tree cover are better. Read more at the BBC News Science & Environment website.
[Hat tip: The Metropolitan Field Guide]