Substrate spawning commonly occurs in nests, rock crevices or even burrows. The eggs are usually laid in abandoned animal burrows and deep crevices. In their native habitats, chinchillas live in burrows or crevices in rocks. Wombats move between burrows and even warrens. Eurasian badgers may live alongside red foxes in isolated sections of large burrows. Many live in cracks, hollows and burrows and hardly move at all. It rests in burrows, grass thickets and scrubs. Occasionally, abandoned European badger or red fox burrows are used. Males tend to occupy deeper burrows than females. Gobiids maintain their burrows by fanning away sand inside the burrows. Logs, trees, rocks, burrows, or abandoned dwellings serve as suitable den sites. Michael Scofield (Wentworth Miller) and Lincoln Burrows (Dominic Purcell). Peter Diamandis, Bassam Mansour, Ulla Tapaninen, Clive Burrows, and Alan Berger. Mating occurs in or near the burrows. These keratin-filled resemble rabbit burrows.