Sima de las Cotorras (in English: Sinkhole of the Parrots/Parakeets) is a

sinkhole A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. The term is sometimes used to refer to doline, enclosed depressions that are locally also known as ''vrtače'' and shakeholes, and to openi ...

located in the

El Ocote Biosphere Reserve Selva El Ocote is a biosphere reserve in Mexico. It includes mid-elevation and highland rain forests and extensive caverns. Geography It is located in the state of Chiapas, covering portions of the municipalities of Cintalapa, Ocozocoautla, Jiq ...

in western

Chiapas Chiapas (; Tzotzil and Tzeltal: ''Chyapas'' ), officially the Free and Sovereign State of Chiapas ( es, Estado Libre y Soberano de Chiapas), is one of the states that make up the 32 federal entities of Mexico. It comprises 124 municipalities ...

, southern Mexico. It is one of a number of sinkholes in the area, all produced by

tectonic Tectonics (; ) are the processes that control the structure and properties of the Earth's crust and its evolution through time. These include the processes of mountain building, the growth and behavior of the strong, old cores of continents ...

and erosive processes on the region's limestone. Although not the largest and deepest of the area's sinkholes, it is best known because of a tourism project which focuses on the thousands of Mexican green parakeets who live there most of the year, flying in and out in circular patterns. Sima de Cotorras Ecotourism Center was established in 1985 to give local Zoque families an alternate means of generating income, preserve the local environment and give younger generations a reason to not migrate from the area. The project has built a road, a restaurant and cabins for visitors, and offers rappelling into the sinkhole as well as guided tours to see the

cave painting In archaeology, Cave paintings are a type of parietal art (which category also includes petroglyphs, or engravings), found on the wall or ceilings of caves. The term usually implies prehistoric origin, and the oldest known are more than 40,000 ye ...

s, the tropical vegetation at the bottom of the formation and the areas around the sinkhole rim. However, most visitors are local and visit for a day only to see the

parakeets A parakeet is any one of many small to medium-sized species of parrot, in multiple genera, that generally has long tail feathers. Etymology and naming The name ''parakeet'' is derived from the French wor''perroquet'' which is reflected in ...

. The Center has had its problems balancing ecological concerns with keeping it economically viable.

Location and environment

The sinkhole is part of a larger park called El Ocote Biosphere Reserve, located in the western part of the Mexican state of Chiapas, about 90 minutes from the state capital of Tuxtla Gutierrez. It belongs to the municipality of Ocozocoautla de Espinoza, about 19 km over rough roads from the town center. This part of Chiapas is dominated by the Zoque people, who call the area Coita, a Zoque word that means “place of rabbits.” The nearest community to the sinkhole is Piedra Parada, which has about 500 residents. The climate of the area is mostly warm and humid, with a rainy season from June to October, receiving an average of 1,500mm of precipitation per year. It is in the

Sierra Madre de Chiapas The Sierra Madre de Chiapas is a major mountain range in Central America. It crosses El Salvador, Guatemala, Mexico and Honduras. The Sierra Madre de Chiapas is part of the American Cordillera, a chain of mountain ranges that consists of an almos ...

, at an altitude of about 820 meters above sea level. This area gets cold enough in the winter to need a light jacket. Most of the vegetation of the area has been wiped out or severely degraded by agriculture, forestry and other human activity.

Geology of the sinkhole

The Sima de las Cotorras belongs to a

Karst Karst is a topography formed from the dissolution of soluble rocks such as limestone, Dolomite (rock), dolomite, and gypsum. It is characterized by underground drainage systems with sinkholes and caves. It has also been documented for more weathe ...

topography system, based on the folding, fracturing and erosion of limestone. This particular system is defined by its drainage system, with the La Venta River on the surface and the main underground river being El Paraíso. Despite its proximity to the Pacific, drainage is towards the Gulf of Mexico. Most of this ecological system is covered by the El Ocote Biosphere Reserve. There are two main forces that shape the landscape. Tectonic forces from the movement of the North American plate over the Farallon and Cocos plates creates

anticline In structural geology, an anticline is a type of fold that is an arch-like shape and has its oldest beds at its core, whereas a syncline is the inverse of an anticline. A typical anticline is convex up in which the hinge or crest is t ...

folds, with a northeasterly orientation. The folding creates cracks in the relatively soft rock and water running above and below erode in and around these fractures. The two processes have created a number of formations including canyons, arches, caves, waterfalls, small pools of water and sinkholes. These same processes make the soil acidic and strewn with loose rock. Major formations include the La Venta River Canyon, the Arch of Time (Arco del Tiempo) and El Aguacero Falls. The Sima de las Cotorras is only one of 38 sinkholes in the region and one of eight within 10km2. It is not even the largest of these, being only half the size of the Las Luchas sinkhole. These sinkholes are vertical depressions formed by the cracking, erosion and collapse of limestone over thousands of years. The Sima de las Cotorras is meters deep, and in diameter, with a straight drop of meters. The opening is elliptical, with the north and southwest rims elevated in relation to the rest. The low point of the rim is in the east. The process reveals the layers of rock, and about meters down, stalactites and stalagmites can be seen among the layers from the surface. There are also caves within the sinkhole walls, which have also been produced by erosion. This type of sinkhole is similar to those found in the

Yucatán Yucatán (, also , , ; yua, Yúukatan ), officially the Free and Sovereign State of Yucatán,; yua, link=no, Xóot' Noj Lu'umil Yúukatan. is one of the 31 states which comprise the federal entities of Mexico. It comprises 106 separate mun ...

, but in general these do not contain pooled water at the bottom.

Biology of the sinkhole

Instead the interior of the sinkhole is home to a tropical forest, whose plant and animal life is distinct from that of the surrounding ecosystem. El Ocote is home to a number of endangered species, especially birds such as ''

Psittacara holochlorus The green parakeet (''Psittacara holochlorus'') is a medium-sized parrot occurring in North and Central America, from the southernmost tip of Texas south to northern Nicaragua. Description The green parakeet is 32 cm in length, and is ...

'', ''

Amazilia viridifons ''Amazilia'' is a hummingbird genus in the subfamily Trochilinae. It is found in tropical Central and South America. Taxonomy The genus ''Amazilia'' was introduced in 1843 by the French naturalist René Lesson. Lesson had used ''amazili ...

'' and ''

Oporornis tolmiei MacGillivray's warbler (''Geothlypis tolmiei'') is a species of New World warbler. These birds are sluggish and heavy warblers, preferring to spend most of their time on, or near the ground, except when singing. left, A MacGillivray's warbler ...

'', as well as other receiving special protection such as ''

Eucometis penicillata The grey-headed tanager (''Eucometis penicillata'') is a widely distributed species of small Neotropical bird in the tanager family Thraupidae. It is the only member of the genus ''Eucometis''. It is found in Central America and northern South A ...

'', '' Lanio aurantius'', ''

Psarocolius montezuma The Montezuma oropendola (''Psarocolius montezuma'') is a New World tropical icterid bird. It is a resident breeder in the Caribbean coastal lowlands from southeastern Mexico to central Panama, but is absent from El Salvador and southern Gua ...

'' and '' Colinus virginianus''. Numbers and types of birds present depends on the time of year, due to migratory patterns. The wider reserve serves as a buffer area for the microclimate of the Sima de las Cotorras. Outside the sinkhole and up to its rim, the climate is drier, mostly grassland/shrub from cattle grazing, and areas called lomería, rocky areas with limited growth, mostly shrubs, due to dense limestone. In some of the higher elevations there are still some forests. Around the sinkhole itself, there are many copal trees, ''

Protium copal ''Protium copal'', commonly known as the copal tree, is a species of tree endemic to Mexico and Central America. It is found in wet tropical forests, preferring heavy shade. It grows to in height and has long leathery leaves. The fruits are smal ...

'' (family Burseraceae), which gave the sinkhole its original name of Sima del Copal. The interior of the sinkhole holds and preserves more moisture. From its bottom grows a tropical deciduous rainforest microsystem with broadleafed species such as

cedar Cedar may refer to: Trees and plants *''Cedrus'', common English name cedar, an Old-World genus of coniferous trees in the plant family Pinaceae *Cedar (plant), a list of trees and plants known as cedar Places United States * Cedar, Arizona * ...

mahogany Mahogany is a straight- grained, reddish-brown timber of three tropical hardwood species of the genus '' Swietenia'', indigenous to the AmericasBridgewater, Samuel (2012). ''A Natural History of Belize: Inside the Maya Forest''. Austin: U ...

, '' Fabaceas espinosa'' and '' Burseraceas baja'', ''

Manilkara zapota ''Manilkara zapota'', commonly known as sapodilla (), sapote, naseberry, nispero or chicle, is a long-lived, evergreen tree native to southern Mexico, Central America and the Caribbean. An example natural occurrence is in coastal Yucatán in th ...

'', scrubs of the family

Guaiacum ''Guaiacum'' (''OED'' 2nd edition, 1989.Entry "guaiacum"
in
Common reserve fauna includes owls, foxes and coyotes, rabbits, opossums, badgers, squirrels, armadillos, '' Penelopina nigra'',

chachalaca Chachalacas are galliform birds from the genus ''Ortalis''. These birds are found in wooded habitats in the far southern United States (Texas), Mexico, and Central and South America. They are social, can be very noisy and often remain fairly c ...

s and of course, parakeets. The park has over 80 bird species in 30 families. Eleven of these are migratory and three are endemic to the area. Seven bird species are classified as endangered by the Mexican government. Most of the bird species 35 of them, are found in the low deciduous rainforest of the sinkholes. These include species which are highly sensitive to human intrusion such as '' Colinus virginianus'', '' Caprimulgus vociferous'', '' Amazilia candida'' and '' Ortalis vetula''. A number of bird species have been found in the Sima de las Cotorras area but not in the larger El Ocote park, including '' Bubo virginianus'', '' Ramosomyia viridifrons'', '' Vireo philadelphicus'', '' Sialia sialis'', '' Passerina versicolor'' and '' Cacicus melanicterus''. SemanaiA01173768 003

The Sima's most famous resident is ''

'', the Mexican parrot, which is endangered. Chiapas is home to over 68% of Mexico's parrots (family

Psittacidae The family Psittacidae or holotropical parrots is one of three families of true parrots. It comprises the roughly 10 species of subfamily Psittacinae (the Old World or Afrotropical parrots) and 157 of subfamily Arinae (the New World or Neotropi ...

). And many of Mexico's parrot species are endangered, mostly due to shrinking habitat, along with the illegal pet trade and other exploitation of the animals. There are an estimated 3,000 parrots associated with the sinkhole and they can be found there most of the year, with the exception November to January, when the weather is too cool for them. The forest of the sinkhole is also their nesting site. From the evening until the early morning, the parrots are congregated in the sinkhole forest, where the noise they make can be quite loud. The parrots’ noise will cease if a predator such as a falcon is seen nearby. The parrots leave the sinkhole to look for food, which includes from

mango A mango is an edible stone fruit produced by the tropical tree '' Mangifera indica''. It is believed to have originated in the region between northwestern Myanmar, Bangladesh, and northeastern India. ''M. indica'' has been cultivated in Sout ...

trees in people's backyards as far away as Tuxtla Gutierrez. They leave the sinkhole in groups, flying in circles on wind currents in order to leave and enter. Inside the sinkhole, the parrots are the most numerous kind of bird. Outside, it is dominated by small birds of the family

Tyrannidae The tyrant flycatchers (Tyrannidae) are a family of passerine birds which occur throughout North and South America. They are considered the largest family of birds known to exist in the world, with more than 400 species. They are the most dive ...

Archeological site

Evidence of human habitation in the area goes back at least 7,500 years, with evidence of hunter/gatherers. However, there were no major pre-Hispanic settlements in this area. The area of the park was first explored and academically documented in the mid 20th century, noting local caves and archeological finds such as pottery. But documentation still remains sparse especially in comparison to other such sites in Mexico. The significant archeological find in and around the Sima de las Cotorras are cave paintings, arrowheads, and much later pottery shards, possibly Zoque. The most important of these are the cave paintings, which number about 75. On a rock outcropping on the north wall, there is a human figure with lance, and with a sun and moon above. One of the side caves has on its roof the outlines of hands made by blowing red ochre onto the wall. Other images include circles, spirals and animals. The appearance of cave painting in such a geological formation and especially so high up the sinkhole walls makes them a rarity, and the site is under consideration by

UNESCO The United Nations Educational, Scientific and Cultural Organization is a List of specialized agencies of the United Nations, specialized agency of the United Nations (UN) aimed at promoting world peace and security through international coope ...

for protective status.

Ecological park

The El Ocote Biosphere Reserve was established in 1972, extendingover 8 hectares, protecting over a hundred species of birds, and dozens of mammals, reptiles and insects, some endangered. With the exception of the Sima de la Cotorras, the park has not been developed for tourism, and its formations are almost completely unknown outside of their region. The other sinkholes in the area get no tourism activity at all. The tourism activity based on the flight of the parrots has made the sinkhole relatively famous and it is now better known as the “sinkhole of the parrots” rather than its official name. Tourism activity here began with the establishment of the Sima de Cotorras Ecotourism Center in 1985 and the building of a road from the town of

Ocozocoautla Ocozocoautla de Espinosa, colloquially Coita, is a town and municipality in the Mexican state of Chiapas. It is located in the western part of the state, 24 km west of Tuxtla Gutierrez covering parts of the Depresión Central (Central Depress ...

to the site. The center was established to provide alternative work for the local Zoque people. Today it is run by the Tzamanguimó cooperative, which consists of a number of families all from the nearby community of Piedra Parada. The project is also registered with the federal government as an ecotourism site, with the aim of being sustainable, providing income for local residents with minimal impact. The group welcomes researchers as well as visitors onto the site. The main challenge has been how to take advantage of the site without damaging it. The ground is unstable and highly porous. Many underground cavities are still unknown, making building risky. The largest structure on the premises is the restaurant. Built near the rim, its site was chosen because of the stability of the rock, not because it was the most aesthetically pleasing place to put the structure. Waste disposal is a main issue because of the threat of groundwater contamination, prompting several composting activities. Bringing water, electricity and more are also challenges. By far the main attraction of the site are the parrots that fly in and out of sinkhole each day, generally leaving in the early morning and returning at night. It is also possible to rappel to the bottom of the sinkhole, as well as explore local caves and hike both in and around the sinkhole. Semanaijbmcpr005

Where possible constructions are based on local materials to allow them to blend into the local environment. Paving and path construction is based on local rock. Pre Hispanic architecture formed the basis of the buildings on the site, including the rock foundation seen on the restaurant building. The Center has eight cabins for up to five persons each, a camping area and tours with local guides. Semanaiarlij019

It has eight cabins which can house five people each. It currently has a restaurant, several cabins to house multiple people, a camping área, a path around the rim of the sinkhole,

rappelling Abseiling ( ; ), also known as rappelling ( ; ), is the controlled descent of a steep slope, such as a rock face, by moving down a rope. When abseiling the person descending controls their own movement down the rope, in contrast to low ...

and tours to see the cave paintings and the rainforest that covers the sinkhole's floor. The Center has provided an alternative source of work other than agriculture and for some, a means for income when before they had none. Despite this, the project has not been claimed as a great success. According to theses done at the Universidad Intercultural de Chiapas, the tourism possibilities here have not been fully exploited. As of 2016, only about 10 to 15 people per day visit the site. Most visitors come by their own cars or through local ecoadventure tourism agencies. Most tourists are between 41–60 years of age, followed by the 31-40 age bracket and those in the 18-30 year bracket. About half come from the state capital of Tuxtla Gutierrez, with about 13% from Mexico City, 12.5 from other parts of Mexico. Only about 2 percent are foreigners. The main problems for the site are the lack of promotion and poor access. The roads leading to the site are very poor, especially the last ten km, and signage is poor or non-existent. The park is difficult to access for those with disabilities. Most visitors learn of the site through word-of-mouth, with some from television and much fewer from other media. The lack of services means that those who do come do not stay for long. Two-thirds come only to see the parrots, some will stay and eat at the restaurant, but very few stay the night. The project over the years has received intermittent support from various government institutions such as

PEMEX Pemex (a portmanteau of Petróleos Mexicanos, which translates to ''Mexican Petroleum'' in English; ) is the Mexican state-owned petroleum company managed and operated by the Mexican government. It was formed in 1938 by nationalization and expr ...

, the Secretary of Tourism, SEMARNAT and the Comision Nacional para el Desarrollo de los Pueblos Indígenas, in areas such as finance, customer service and construction. But these interventions have not always been helpful, with functionaries using technical jargon and dismissing local knowledge of the area. Changes in political parties has led to varying attitudes towards the project and its ecological focus, with errors being made such as cutting down trees to make way for cement electrical poles and the construction on non-composting toilets. At its height, the Center generated about 80 to 100 jobs directly, but since the tourist demand has declined. The project is specifically geared to keep young people in the area, but they have not shown sufficient interest in its continuation. Most members of the cooperative are between 50 and 80 years of age. Only about 30% of the local population recognizes the area's intangible value, but 80% favor efforts to make the area better known. Even with sufficient interest and promotion, the area is not suited for large-scale tourism. One reason is the need to keep ecological concerns first and the other is that alternative and eco-tourism are not major attractions for most Mexicans.

References

{{commons category, Sima de las Cotorras

External links

Chiapas travel guideMoon Handbook description
Sinkholes of Mexico Landforms of Chiapas Limestone caves