"The song was basically the first inkling that this was an odd bird," David Toews, assistant professor of biology at Penn State and lead author of the study, told USA TODAY. He also underlined ...

"I love this story, because it starts with a little mystery and ends with a surprising discovery," said biologist David Toews in a Penn State statement Wednesday. Toews is the lead author of a ...

Penn State researchers have identified a rare hybrid of two western Pennsylvania songbirds. The bird is a combination of the rose-breasted grosbeak and brightly-colored scarlet tanager. Stephen ...

"MacArthur suggested that we needed to look more closely at species interactions," said David Toews, Louis Martarano Career Development Professor of Biology in the Penn State Eberly College of ...