Flightless bird requirement for flightlessness. The kiwi does not exhibit gigantism, along with tinamous, even though they coexisted with the moa and rhea that both exhibit gigantism. This could be the result of different ancestral flighted birds arrival or because of competitive exclusion. The first flightless bird to arrive in each environment utilized the large flightless herbivore or omnivore niche, forcing the later arrivals to remain smaller. In environments where flightless birds are not present, it is possible that after the K/T Boundary there were no niches for them to fill. They were pushed out by other herbivorous mammals. New Zealand had
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