Divers & Grebes Red-throated Diver; 1st year Ireland March 2009. 1st Summer Dublin March 2010. Red-throated Diver; Adult from Alaska June 2008; Black-throated Diver; Pacific Diver; Adults from Alaska June 2008; Great Northern Diver; Adult & juvenile from Ireland. Updated December 2009. Great Northern Diver; Adults from Alaska June 2008; White-billed Diver; Red-necked Grebe; Adults from Alaska June 2008; Race holbollii. Red-necked Grebe; Winter plumage Galway February 2009; Dublin 2010. Race grisegena. Slavonion Grebe; Black-necked Grebe; Pied-billed Grebe; California-July-2006. Little Grebe; Western Grebe; California-July-2006. Great-crested Grebe;