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
Work Is a Four-Letter Word was a member of the Royal Shakespeare Company, of which Peter Hall was artistic director until the year of the film's release. Cilla Black had not previously had a starring role; she had appeared briefly as herself in "Ferry Cross The Mersey" (1965), a vehicle for Gerry and the Pacemakers. She recorded the theme song for the film, having the same title, which was released as the B side of "Where Is Tomorrow?" in 1968; the single reached number 39 in the UK Charts. This would be Black's only starring role in film. Most of the remainder of the cast