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) first week, his best sales week to date. In Canada, the album debuted at number one on the Canadian Albums Chart, selling 19,300 copies. This is Mraz' first number one debut in Canada. Up to April 24, 2014, the album has sold 547,755 copies in the United States. It has been certified Gold in Brazil. "The World As I See It" was released as the first pre-release track on September 20, 2011. This version differs slightly from the album, the latter having an additional string part. Later, "I Won't Give Up" was released as the album's first official single on