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
So Long a Letter So Long a Letter So Long a Letter () is a semi-autobiographical epistolary novel originally written in French by the Senegalese writer Mariama Bâ. Its theme is the condition of women in Western African society. "So Long a Letter", Mariama Bâ's first novel, is literally written as a long letter. As the novel begins, Ramatoulaye Fall is beginning a letter to her lifelong friend Aissatou Bâ. The occasion for writing is Ramatoulaye's recent widowhood. As she gives her friend the details of her husband's death, she recounts the major events in their lives. The novel is often used in literature