Pacific Loon (Gavia pacifica) Pacific Loon (Gavia pacifica): Species account describes this bird's identifying traits, nesting, diet, and taxonomy. (Gaviiformes) http://www.mbr-pwrc.usgs.gov/id/framlst/i0100id.html
Gavia pacifica (Pacific Loon) Gavia pacifica (Pacific Loon): Scientific classification, food habits, behavior, and habitat of this species. (Gaviiformes) http://animaldiversity.ummz.umich.edu/site/accounts/information/Gavia_pacifica.html
Common Loon (Gavia immer) Common Loon (Gavia immer): Photo, range maps, and facts on this bird's habitat, nesting, and behavior. (Gaviiformes) http://www.nenature.com/CommonLoon.htm
Arctic Loon (Gavia arctica) Arctic Loon (Gavia arctica): Images of this species in Japan. (Gaviiformes) http://www.amazilia.net/images/Birds/Loons/ArcticLoon.htm
Yellow-billed Loon (Gavia adamsii) Yellow-billed Loon (Gavia adamsii): Image, taxonomy chart, identification tips, and facts about this species' breeding. (Gaviiformes) http://www.mbr-pwrc.usgs.gov/id/framlst/i0080id.html
White-billed Diver (Gavia adamsii) White-billed Diver (Gavia adamsii): Images of a bird in Lincolnshire, UK. (Gaviiformes) http://www.lincsbirdclub.co.uk/rare_birds/white_billed_diver_2.htm
Black-throated Diver (Gavia arctica) Black-throated Diver (Gavia arctica): Video, ID, and European range. (Gaviiformes) http://www.birdguides.com/html/vidlib/species/gavia_arctica.htm
Gavia stellata (Red-Throated Loon) Gavia stellata (Red-Throated Loon): Taxonomy, distribution, physical characteristics, and natural history of this bird. (Gaviiformes) http://animaldiversity.ummz.umich.edu/site/accounts/information/Gavia_stellata.html