Genetic confirmation of a hybrid between two highly divergent cardinalid species: A Rose-breasted Grosbeak (Pheucticus ludovicianus) and a Scarlet Tanager (Piranga olivacea)

David Toews, Tessa Rhinehart, Robert Mulvihill, Spencer Galen, Stephen Gosser, Tom Johnson, Jessie Williamson, Andrew Wood & Steven Latta
Using low-coverage whole-genome sequencing, analysis of vocalizations, and inferences from natural history, we document a first-generation hybrid between a rose-breasted grosbeak (Pheucticus ludovicianus) and a scarlet tanager (Piranga olivacea). These two species occur sympatrically throughout much of eastern North America, although were not previously known to interbreed. Following the field identification of a putative hybrid, we use genetic and bioacoustic data to show that a rose-breasted grosbeak was the maternal parent and a scarlet tanager...
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