Many mammals live in the park, including foxes, beech marten, wild boars, rabbits, deer, badgers and genets, though not in large numbers. Bird species include colonies of vultures, golden eagles, peregrine falcons, hawks, kestrels, owls - especially Scops owls, partridges, quail, doves, larks, robins, and finches. Several European thrush species and the barbary dove are numerous enough to influence the dispersal of plants like "Celtis australis", "Cynanchum acutum", and bittersweet nightshade. The Tranquera Reservoir and Gallocanta Lagoon create marsh land, which are home to mallards, ducks, pochard, coots, teal, herons and cormorants. Frogs, painted frog, newts, lizards, and various kinds of snakes can be found here as well. The most common fish are trout, catfish and nase, and some areas are stocked with carp and rainbow trout. Local invertebrates include the crayfish "Procambarus clarkii", tarantulas and other spiders, butterflies, "Brachycera" flies, damselflies and dragonflies.