Gavia arctica

tags: Pacific Loon, Pacific Diver, Gavia pacifica, Gavia arctica, birds, mystery bird, bird ID quiz [Mystery bird] Pacific Loon, known in Europe as the Pacific Diver, Gavia pacifica (formerly lumped with Gavia arctica), photographed in Monterey Bay, California. [I will identify this bird for you in 48 hours] Image: Joseph Kennedy, 7 May 2010 [larger view]. Nikon D200, Kowa 883 telescope with TSN-PZ camera eyepiece 1/750s f/8.0 at 1000.0mm iso400. Please name at least one field mark that supports your identification. This elegant mystery bird's common and scientific names have a…