Rio Lagartos Adventures since 1995 Guided Nature and Flamingo Tours in Rio Lagartos, Yucatan. Ria Lagartos Biosphere Reserve, Yucatan is the home to Mexico’s largest flock of Flamingos 40,000+ plus 395 species of birds have been identified Every tour is designed for maximum wildlife viewing and photo opportunities—never rushed, never shared. Trusted Since 1995 We’ve been sharing this place with nature lovers for nearly 30 years. Come see why we’re a top-rated tour operator in the Ria Lagartos Biosphere Reserve.