Ken Rosenberg discusses the findings of his influential co-authored paper published in Science (Rosenberg et al. 2019), which describes how North America has lost about 3 billion birds since 1970. The declines are not restricted to rare and threatened species; those once considered common and widespread are also diminished. About one-third of this decline are forest-dwelling species, including wood warblers, aerial insectivores, finches, and thrushes. Ken discusses the threats of forest habitat loss, climate change, pesticides, and other factors, and identifies opportunities for bird population recovery. This work has major implications for forest ecosystem integrity, the conservation of forest birds, and policies associated with the protection of birds and the ecosystems on which they depend.

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