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Butterflies of Tamaulipas
Northern Prairie Wildlife Research Center listing of species reported in the state.
Gómez Farías Region and El Cielo Biosphere Reserve
Report on geography, flora and fauna, and cultural setting, from Smithstonian Institute's Centres of Plant Diversity.
Grutas de Bustamante (Caves of Bustamante)
Overview and links to information about the huge cave system just outside of Bustamante.
World Institute for Conservation and Environment (
List of resident and migratory birds, with common names in English and Spanish.