Crest (feathers) Crest (feathers) The crest is a prominent feature exhibited by several bird and other dinosaur species on their heads. The crest is made up of semiplume feathers: a long rachis with barbs on either side. These are plumulaceous feathers, meaning that they are soft and bendable. In birds, these semiplumes are common along the head, neck, and upper back, and may be used for buoyancy and sensing vibrations. Crests on birds are generally used for display purposes. Cockatoos and their smaller cousins, cockatiels, are part of the parrot family Cacatuidae found in Australia, the Bismarck Archipelago and the Philippines, and
Calamus, Wisconsin 105.1 males. For every 100 females age 18 and over, there were 110.4 males. The median income for a household in the town was $50,000, and the median income for a family was $54,107. Males had a median income of $33,636 versus $24,671 for females. The per capita income for the town was $19,818. About 5.5% of families and 7.8% of the population were below the poverty line, including 13.0% of those under age 18 and 5.4% of those age 65 or over. Calamus, Wisconsin Calamus is a town in Dodge County, Wisconsin, United States. The population was 1,005 at