An unusual pairing of two different species of geese — a greater white-fronted goose, left, and a Canada goose, right — built a nest together in Blue Lake Regional Park. Biologists say it's rare to ...

In Portland, Ore., two distinct species of geese have paired up and laid eggs. It's not completely unheard of for a Canada goose and a white-fronted goose to mate — but it's unusual. This time of year ...

The Pennsylvania Game Commission documented four Canada geese at least 16 years old this summer. The agency bands about 2,000 geese annually during their molting phase in June and early July. Banding ...