Despite the fact that much of the area has been reduced to a patchwork of clearings for cattle ranches and peasant communities, the Lacandon contains some of the most extensive and best preserved remnants of lower montane rainforest in Mexico and Central America. The best conserved area is within the Montes Azules Biosphere Reserve, which has about 290,000 hectares of the Reserve in good condition. The Lacandon is the best known of Mexico's rainforest areas because of the attention it has received in the press and efforts by international organizations to protect what is left of it. The Lacandon is one of the most biodiverse rainforests in the world, with as much as 25% of Mexico's total species diversity. The predominant native vegetation is perennial high rainforest with trees that can grow to an average height of thirty meters and often to fifty or sixty including "Guatteria anomala", "Ceiba pentandra", "Swietenia macrophylla", "Terminalia amazonia" and "Ulmus mexicana". Mammoth Guanacaste trees shrouded in vines and bromeliads among clear running streams, enormous ferns, palms and wild elephant's ear plants can still be seen. It has 1,500 tree species, 33% of all Mexican bird species, 25% of all Mexican animal species, 44% of all Mexican diurnal butterflies and 10% of all Mexico's fish species. The jungle contains many endangered species such as the red macaw, the eagle, the tapir, the spider monkey, the howler monkeys, and the swamp crocodile. Jaguars are reported, though rare, in Selva Zoque.