This Pacific Golden Plover in breeding plumage was foraging on a large lawn. I am on a list to receive regular e-mails from a birder and photographer named Jim Stevenson. He has explained why species (like this one) which nest in the Arctic, often have black bellies for their breeding plumage. In the areas where they nest, the sun shines 24 hours a day but is low in the sky. By aligning themselves with the rays from the sun, these birds are able to use their black plumage to gather more heat from the sun to help incubate their eggs. That’s a pretty ingenious adaptation.