Across the sunset stillness of a deserted northern lake, the unearthly wail of the common loon completed a lifetime memory. Loons were calling and the water was like glass. I was scuba diving in Lake ...

The common loon is an uncommon bird, one of five loon species sharing a long history, and believed to be most closely related to — wait for it — penguins. The other four loons are Pacific, Arctic, red ...