There are birding destinations chosen for one species and destinations chosen for a number. Chiapas belongs to the second group, and the number is large: 694 recorded species, the richest list of any Mexican state.
What makes the trip different is not only the figure, but how it is distributed. Here you do not have to cross half a country to change bird community: you have to climb.
01 Six hundred and ninety-four
The figure is worth putting in context. Chiapas covers around 3.8 per cent of Mexico's surface and holds, across all biological groups, some 11,223 species against the 29,429 recorded for the whole country.
For birds, the national biodiversity commission places the state first in the country with those 694 species. No other Mexican state has a comparable list in such a small territory.
Translated into fieldwork, that means a well-planned two-week route can pass through bird communities that elsewhere on the continent are separated by thousands of kilometres of latitude.
02 Why so many appear in so little space
The explanation lies in the shape of the state. Chiapas is organised in steps parallel to the coast: the Pacific coastal plain, the Sierra Madre de Chiapas, the Central Depression, the Altos, and the northern and eastern mountains dropping towards the rainforest.
Each step supports its own community. Below, on the plain and the coastal wetlands, there are waterbirds and mangrove species. In the Central Depression, where 1,053.6 millimetres fall a year against the coast's 2,057.8, dry-country birds appear. In the Altos, the pine and oak species. And in the cloud-forest band, those that live nowhere else.
That last band is what gives the trip its value. Cloud forest is a narrow level, roughly between 1,500 and 2,500 metres, and the species that depend on it have tiny distribution ranges.
03 El Triunfo, which is the hard one
The El Triunfo biosphere reserve was decreed on 13 March 1990 and protects 119,177 hectares of the Sierra Madre de Chiapas. Its cloud forest is considered one of the most tree-diverse in North and Central America.
The fauna figures follow: 378 bird species, 112 mammals, 55 reptiles and more than 2,000 flowering plants, more than 3,590 plant and animal species in all. Among the birds are the resplendent quetzal and the horned guan, a large mountain bird with a red protuberance on its forehead.
Access is the demanding part. It is organised from Jaltenango de la Paz, some 150 kilometres south of Tuxtla Gutiérrez, and you go in on foot, with a permit and a guide, on multi-day routes. It is not a half-morning visit and it is not improvised.
Three point eight per cent of the country with the richest bird list in Mexico: the reason is not size, it is height.
04 And the levels you can do without effort
The common mistake is to build the whole trip around the hardest site. Chiapas has altitude bands you can work from a road that contribute an enormous share of the list.
The Central Depression provides the dry-country set, with the Sumidero canyon as a natural viewpoint over several hundred metres of wall. The Altos, around San Cristóbal, give mountain pine and oak, with average highs oscillating barely between 20.5 and 24.0 degrees all year.
The Montebello lakes, around 1,500 metres, add humid montane forest and open water. And the northern slope, towards the lowland, contributes the humid lowland forest set. Four quite distinct habitats, all reachable by car.
05 When to go and with what expectation
The calendar is decided by rain. From November to March, Tuxtla records between 1.4 and 12.3 millimetres a month and San Cristóbal between 4.4 and 32.8: firm tracks, open sky and visibility. From June to September, the same stations climb above two hundred millimetres.
April is out for another reason: it is the hottest month, with average highs of 36.1 degrees in the Central Depression. In the lowlands, activity shuts down very early in the morning.
And expectations need calibrating. In cloud forest visibility is short, light is scarce and much of the work is done by ear. Some days simply do not work out, and that is part of the format.
06 How to build the trip
Ten to fourteen days divide up well. The most productive structure is not to tick off famous places, but to follow one complete cross-section and stop at each altitude band long enough for its community to come out.
A reasonable split is three or four days in the lowlands, two or three in the Central Depression, three in the Altos, and the El Triunfo block separately, with its days of walking, if the goal includes the cloud-forest species.
Two things are worth settling in advance: the local guide, who in this terrain multiplies the list, and the protected-area permits, which are not arranged on the fly. The rest is getting up early.
What justifies the trip is not one particular species, although there are two or three that can be seen only here and in western Guatemala. It is the density: in very few kilometres you cross entire communities that elsewhere would demand a continent.
