Trabancos (river) Castile and León (with more than 200 mating pairs). It is also the winter season nesting ground of more than 1,500 red kites ("Milvus milvus"). There are also numerous birds of prey; the most abundant are Montagu's harriers ("Circus pygargus", 50 mating pairs) and lesser kestrels ("Falco naumanni"; almost 150 mating pairs), but there are also hawks, goshawks, falcons, owls, and others. The region is also host to numerous gamebirds, including the red-legged partridge ("Alectoris rufa"). Despite their importance, the population of little bustard ("Tetrax tetrax") in the region appear to be diminishing. Although not all the species protected in
Ben 10: Destroy All Aliens back at his house and Tetrax restores Ben's Omnitrix to normal just as the Mechamorph catches up to them. Gwen sees how the Omnitrix reacts after Ben returns to human form and deduces what has happened just as she, Ben, Tetrax and the Mechamorph are transported into the Omnitrix itself. Inside, Ben and the Mechamorph continue to battle before being attacked by a swarm of Stinkflies just as Gwen and Tetrax are ambushed by a herd of Wildmutt. The four catch up with each other and they realize that the evil Waybig is inside with them just as he resurfaces.