Olsen’s sparrow research focus of Granite Geek article

Granite Geek published an article on a study conducted by a group of researchers including Brian Olsen, assistant professor of biology and ecology at the University of Maine. Some closely related bird species interbreed where their ranges overlap, producing hybrid offspring that can backcross with either parent species until a whole population of mixed-species birds read more Olsen’s sparrow research focus of Granite Geek article