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) on the album." Sandy Cohen from "The Boston Globe" wrote, "The songs about heartache don't detract from the optimistic vibe of this 12-song collection." Jon Caramanica from "The New York Times" criticized the album, writing that the album is "filled with platitudes and, eventually, psychobabble, dippy even by Mr. Mraz's standards." Phil Mongredien from "The Observer" gave the album only 1 star out of 5, writing that "the lyrics alternate between the ludicrous and the banal." Amy Dawson from Metro UK wrote that "Mraz's earnest, melodic guitar pop exerts mainstream appeal, but this will all be a bit earnest teen