The north of the municipality is dominated by deciduous rainforest, which loses much of its leaves in the dry season. The center and northwest are dominated by pine and oak forests. Pine and holm oak forests are found mostly above 2,000 masl. The forests of the municipality are its most important natural resource. The types of wildlife is very varied and includes white-tailed deer, pumas, tigrillos (Leopardus tigrinus or Leopardus wiedii), bobcats, coyotes, raccoons, opossums, armadillos, foxes, skunks, hares and rabbits. Birds are especially varied and include woodpeckers, American goldfinches, sparrows, parrots, macaws and ravens. Reptiles include rattlesnakes and coral snakes as well as “river shrimp” or acamaya. A group of researchers from the Natural Sciences Faculty of the Universidad Autónoma de Querétaro have discovered a new species of crustacean similar to a very large shrimp or small lobster in the municipality. The crustacean is found in fresh water mostly in the Platanos Arroyo and can grow to a size of up to eight centimeters. Locally, the creature is called an “acocil” or freshwater lobster, like other creatures found in other parts of Mexico. However, studies have shown that this crustacean show enough peculiarities to warrant it as a separate species. The formal name for it is Procambarus Yacoy.