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
¿Which Side Are You On? ¿Which Side Are You On? ¿Which Side Are You On? is the 17th studio album by singer-songwriter Ani DiFranco, released on January 17, 2012. The title track is a revised version of the 1931 Florence Reece song "Which Side Are You On?" which was popularized by Pete Seeger. Seeger also provides accompanying vocals and banjo on the track. The album so far has a score of 69 out of 100 from Metacritic based on "generally favorable reviews". "The Boston Globe" gave it a favorable review and stated that most of it "strikes a natural balance between matters of the heart