Feather development non-nervous. They have a tubular central shaft called the rachis; coming off either side of the rachis are the veins, which have a series of barbs with interlocking connections that are called barbules. The rachis and attached veins make up the spathe. The opposite of the rachis is the calamus, which anchors the feather to the body and is moved by attached dermal muscles. There are many different types of feathers that mostly follow this basic design with few variations based on evolutionary needs. Feathers are sometimes referred to as “elaborate reptile scales” just as birds are sometimes viewed as
Calamus, Wisconsin Calamus, Wisconsin Calamus is a town in Dodge County, Wisconsin, United States. The population was 1,005 at the 2000 census. The unincorporated community of South Beaver Dam is located in the town. The unincorporated community of Lost Lake is also located partially in the town. The town was founded on January 22, 1846. According to the United States Census Bureau, the town has a total area of 36.5 square miles (94.7 km²), of which, 36.1 square miles (93.4 km²) of it is land and 0.5 square miles (1.2 km²) of it (1.29%) is water. As of the census of 2000,