Avian clutch size of increasing clutch size with increasing latitude. The proximate and ultimate causes for this pattern have been a subject of intense debate involving the ideas of group and individual selection. David Lack observed a direct relationship between latitude and avian clutch size. Birds near the equator laid approximately half as many eggs as those that resided in northern temperate habitats. He observed an increasing clutch-size from the equator towards the poles (something he referred to as the “latitude trend”) for many passerine (perching) birds, near-passerine (tree-dwelling) birds and in various other groups: Strigiformes, Falconiformes, Ciconiiformes, Laridae, Ralliformes, Galliformes, Podicipedifomes, and
For the Birds (film) top, which is accompanied by the squeaks the birds made to communicate with each other. A similar appearance occurred in "Inside Out", while Riley and her family are driving to San Francisco at the beginning of the movie. "For the Birds" is one of two short films on the DVD and VHS release of "Monsters, Inc." The film was also released as part of "Pixar Short Films Collection, Volume 1" in 2007. For the Birds (film) For the Birds is a 2000 computer animated short film produced by Pixar and directed by Ralph Eggleston. It won the Academy Award for