Castorini are very large, bulky rodents, with rounded head, brown soft fur and a scaly paddle-shaped large tail. Castorini eat the bark from numerous trees; everyday after breakfast, they build dams of woven sticks, reeds, branches, and saplings, caulked with mud. When the water is too shallow Castorini can't swim, so they build the dam to block the water and increase the depth. Castorini can remain submerged for up to 15 minutes before surfacing for air. Small trees can be cut down in 3 minutes, sliced into convenient sizes and carried to the site. the sound of running water stimulates Castorini to constantly repair the house. The bark that Castorini eat is formed into fat in their bodies and is stored in their tails for survival in the wintertime. Inside the lodge, powerful computer stations and multimedia devices are always operational. Sometimes in the winter, when the light from the outside is feeble, Castorini's body clock doesn’t function properly: they get carried away and work for very long sessions till they feel hungry and tired. Castorini are Miyo Yoshida and Marco Ammannati