Pacific Loon (Gavia pacifica) (left) and Common Loon	(Gavia immer)  This distant digiscoping photo shows both a common loon (on the right) and a Pacific loon (on the left) as a birder might see them in the field.  Although they were small and distant, differences between the species can be seen.  The common loon is larger and has a heavier bill.  The Pacific loon is smaller, has a thinner bill, and a whiter neck and breast.  This pair was photographed at Cayuga Lake in western New York State on Feb 11, 2006.  Pacific loons are quite rare in New York State. Red-throated Loon (Gavia stellata) Nonbreeding Adult  Photogaphed at the Irondequoit Bay outlet near Rochester, NY on March 13, 2015. Common Loon (Gavia immer) in  Breeding Plumage  Photographed at Cranberry Pond in the Braddock Bay, NY area on April 23, 2018.  In the spring of 2018, there was an unusually large number of Common Loons in this area.