Ivory gull narrower os pubis, and potentially more flexibility in skull kinetic structure. Structurally, it is most similar to the kittiwakes; however, recent genetic analysis based on mtDNA sequences shows that Sabine's gull is the ivory gull's closest relative, followed by the kittiwakes, with Ross's gull and swallow-tailed gull sharing a clade with these species. "Pagophila" is maintained as a unique genus because of the bird’s morphological, behavioral and ecological differences from these species. Colloquial names from Newfoundland include slob gull (from "slob", a local name for drift ice) and ice partridge, from a vague resemblance to a ptarmigan. This species is
Love Is a Four Letter Word (album) drama soundtrack for some." Loh Chuan Junn from MediaCorp's xinmsn opined that "every song on this album is listenable, but when put on loop, Mraz's relentlessly upbeat and happy romanticism grows increasing annoying for even the least cynical." In the United Kingdom, the album debuted at number two on the UK Albums Chart behind Adeles "21" by a margin of 44 copies. It sold 17,021 copies and is Mraz' highest-charting album there. In the United States, "Love Is a Four Letter Word" debuted at number two on the "Billboard" 200, becoming his highest-charting album. It sold 102,000 copies in its