The Mysterious Bird is a One-Of-a-Kind Hybrid That Looks Like Mom and Sings Like Dad

She was a grosbeak, he was a tanager, can we make it any more obvious?

“Devoted birder” Stephen Gosser was roaming through the forests of Western Pennsylvania when he stumbled across an extraordinary sighting. His ears first caught up on the call of a scarlet tanager, which is famed for its blood-red plumage and distinctive black wings, but he was met by a rose-breasted grosbeak.

The bird sung once again, showing that it was the source of the sound; nevertheless, why was it singing the wrong song? Blood testing later revealed that the healthy man was the first reported occurrence of a hybrid between these two species, which had evolved independently for about 10 million years. That appears to have changed.

“I enjoy this narrative because it begins with a little mystery and ends with a startling revelation,” said David Toews, assistant professor of biology at Penn State and lead author of the research.

The intriguing bird’s Scooby-Doo unveiling began with trapping it so blood samples could be gathered. They were able to collect DNA and do genetic tests using these, which they compared to bioacoustics analysis to determine if the animal’s genotype lined up against its phenotype – the label given to an individual’s observable features.

“What some individuals may not realize is that when we examine songbirds, we are not truly listening to them.” “We’re looking into it,” Toews said. “We’re looking at sound wavelengths – or, to be more precise, a spectrogram – and evaluating visual components of a soundwave to assess the music.”

The bioacoustics revealed that the juvenile bird learnt to sing from his father, adopting the song of a scarlet tanager while appearing like his mother, a rose-breasted grosbeak. This finding was corroborated by genome sequencing, which indicated that mom and dad were grosbeaks and tanagers (can we make it any clearer?)

“We utilized the same technologies we’ve used to detect other hybrids, but we usually get more confusing results that are a little more esoteric,” Toews concluded.

“In this case, we were able to identify the species.” We know who the parents were, and we have a reasonably nice ending. This narrative appeals to more than simply the usual ornithological nerd like myself.”