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
Angry Birds Birds Space video game, such as creating characters and shooting birds at pigs. The attraction was also opened in the Space Center Houston. It was announced that the first Angry Birds World theme park will open at Doha Festival City. The first phase (which includes the indoor part) opened on June 3, 2018. The "Angry Birds" characters have been referenced in television programs throughout the world. The Israeli comedy show "Eretz Nehederet" (in English: "a Wonderful Country"), one of the nation's most popular TV programs, satirized recent failed Israeli-Palestinian peace attempts by featuring the Angry Birds in peace negotiations with