Sabine's gull treated as comprising a monotypic genus; it is only placed within the genus "Larus" when the genus is enlarged. The black bill and notched tail are almost unique within the gulls, as they are shared only with the swallow-tailed gull of the Galapagos. On the basis of this the two species were often thought to be each other's closest relatives, a hypothesis ruled out by a number of behaviour and ecological differences. Mitochondrial DNA studies confirmed that they are not closely related, and the closest relative of the Sabine's gull is now thought to be the ivory gull, another Arctic
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