quality:correction, structural:scholar_edition
Chiapas, officially the Free and Sovereign State of Chiapas, is one of the states that make up the 32 federal entities of Mexico. It comprises 124 municipalities as of September 2017 and its capital and largest city is Tuxtla Gutiérrez. Other important population centers in Chiapas include Ocosingo, Tapachula, San Cristóbal de las Casas, Comitán, and Arriaga. Chiapas is the southernmost state in Mexico, and it borders the states of Oaxaca to the west, Veracruz to the northwest, and Tabasco to the north, and the Petén, Quiché, Huehuetenango, and San Marcos departments of Guatemala to the east and southeast. Chiapas has a significant coastline on the Pacific Ocean to the southwest. In general, Chiapas has a humid, tropical climate. In the northern area bordering Tabasco, near Teapa, rainfall can average more than 3,000 mm (120 in) per year. In the past, natural vegetation in this region was lowland, tall perennial rainforest, but this vegetation has been almost completely cleared to allow agriculture and ranching. Rainfall decreases moving towards the Pacific Ocean, but it is still abundant enough to allow the farming of bananas and many other tropical crops near Tapachula. On the several parallel sierras or mountain ranges running along the center of Chiapas, the climate can be quite moderate and foggy, allowing the development of cloud forests like those of Reserva de la Biosfera El Triunfo, home to a handful of horned guans, resplendent quetzals, and azure-rumped tanagers. Chiapas is home to the ancient Mayan ruins of Palenque, Yaxchilán, Bonampak, Chinkultic and Toniná. It is also home to one of the largest indigenous populations in the country, with ten federally recognized ethnicities.