Accurately determining avian species limits has been a challenge and a work in progress for
most of a century. It is a fascinating but difficult problem. Under the biological species …

Context Understanding the factors limiting populations of animals is critical for effective
conservation. Determining which factors limit populations of migratory species can be …

Evolutionary radiations provide important insights into species diversification, which is
especially true of adaptive radiations. New World wood warblers (Parulidae) are a family of …

Strong yet incomplete reproductive isolation in Vermivora is not contradicted by other lines of
evidence: A reply to Toews et al. - PMC Back to Top Skip to main content NIH NLM Logo …

Conserving and managing migratory species is inherently complicated due largely to their
reliance on multiple landscapes at different stages of their annual cycle. The combination …