Laguna de los Pozuelos

Laguna de los Pozuelos is a high-altitude wetland of 16,224 hectares located in the Santa Catalina department of Jujuy province, at 3,650 metres above sea level, designated National Natural Monument in 1980 and a RAMSAR site of international importance since 1992 for being critical habitat for the three Andean flamingo species (Chilean, Andean, James) and for more than 120 species of high-Andean birds. The lagoon sits in a closed basin between the Cochinoca Range to the south and the Escaya Range to the north, fed by seasonal rivers (Río Santa Catalina, Río Cincel, Río Puesto Grande) that fill it during the wet season and partially dry it out, with water levels varying from 60 cm to 1.80 m between seasons. The high salinity of the water (the result of millions of years of evaporation without drainage) generates a unique ecosystem where red microcrustaceans (Artemia franciscana and others) proliferate — these are the food base for the flamingos and give them their characteristic pink colour. At peak migration (March-May and September-November) up to 25,000 flamingos have been counted simultaneously, making the lagoon one of South America's most impressive ornithological spectacles, alongside the Atacama Salt Flat (Chile) and Lake Titicaca (Peru-Bolivia). The site also harbours guanacos, wild vicuñas (herds of 20-50 animals are seen around the lagoon), mountain vizcachas, red foxes, and occasionally pumas that come down from the highlands hunting guanacos. Argentina's National Parks Administration runs an interpretation centre in the village of Lagunillas del Farallón (main access, 800 inhabitants, Kolla community), with rangers who orient visitors, explanatory panels and toilets. Access requires careful driving: RN 7 is consolidated gravel but with washboarded sections; in heavy summer rain it can be closed for 24-48 hours. The natural base for the visit is Abra Pampa (50 km south, the "Puna capital", 3,484m), where there are modest hotels and restaurants; alternatively you can come on a full day from La Quiaca (120 km north) or on an organized 2-day tour from San Salvador de Jujuy. The 3,650m altitude requires progressive prior acclimatization (sleep one night in Humahuaca 2,940m, another in Abra Pampa 3,484m, and only then climb to Pozuelos) to avoid severe altitude sickness. The best time to visit is March-May: after the summer rains the lagoon reaches its maximum extent, the flamingos are in full breeding activity, daytime weather is mild (15-20°C in full sun) with intensely blue skies, and there's no snow or ice on the roads.

The Andean Flamingos — All 3 Species

Chilean Flamingo (Phoenicopterus chilensis)

The most common (70-80% of the lagoon population), the largest (110 cm tall, 90-125 cm wingspan) and the least rare. Recognised by its grey legs with red "knee" joints and pale pink plumage. Breeds across most of South America (Argentina, Chile, Bolivia, Peru, Brazil). Here in Pozuelos it arrives to feed and breed. Not endangered according to IUCN (least concern).

Andean Flamingo (Phoenicoparrus andinus) — "Parina Grande"

The second most numerous species (15-25%). 100 cm tall. Fully yellow legs, black bill base with yellow tip. Paler pink plumage with black wing markings. Endemic to the Puna (Argentina-Chile-Bolivia-Peru at altitudes from 2,300 to 4,500m). Status: Vulnerable (IUCN). Seeing this species is a highlight for ornithologists.

James Flamingo (Phoenicoparrus jamesi) — "Parina Chica"

The smallest (90 cm) and rarest (5-10% of the population). Fully red legs, yellow bill with black tip, intense pink plumage with red marks around the eye. Strict Puna endemic. Status: Near Threatened. It was "rediscovered" in 1957 after being considered extinct since 1940. In Laguna de los Pozuelos it concentrates particularly from March to May.

How to Visit — Step by Step

Step 1 - Prior acclimatization: sleep at least one night at 2,500-3,500m beforehand (Purmamarca, Humahuaca, or Abra Pampa). Don't go up directly from Salta capital.

Step 2 - Early start: leave Abra Pampa at 7:30-8:00 to reach the lagoon at midday (best light for photos) and return before sunset (the gravel roads with poor visibility are dangerous).

Step 3 - Lagunillas del Farallón Interpretation Centre: mandatory first stop. Rangers brief on day's conditions and viewing spots. Toilets, info panels.

Step 4 - Lagoon viewpoints: three main viewpoints. South (near Lagunillas), west (best for sunset), and north (more remote). Binoculars essential — flamingos are 200-800 metres from viewpoints to avoid disturbance.

Step 5 - Controlled walks: marked trails allow approach to within 150m of the water. Silence required. Don't leave the trails. Without loud noises, the flamingos won't be scared off.

Step 6 - Return: don't go alone. Don't drive at night (frosted gravel is dangerous). Always with extra fuel.

Combining with Other Puna Sites

Laguna de los Pozuelos is part of the larger Jujuy Puna circuit:

• Abra Pampa (50 km): logistics base with hotels and Museum of the Puna Man.
• Santa Catalina (100 km): old colonial mining town with 18th-century silver veins.
• Yavi (130 km): colonial church 1690, the Marquisate.
• La Quiaca (120 km): border with Bolivia.
• Cusi Cusi (145 km): the "mini Uyuni" of Argentina, Mars-like coloured landscape.
• Cerro Zapaleri (330 km): tri-border peak where Argentina, Chile and Bolivia meet.
• Tuzgle Volcano (430 km): 5,520m, one of the more accessible volcanoes from the Puna.

Practical Info — Before You Go

• Fuel: fill up in Abra Pampa or La Quiaca. No gas stations for 100 km between Abra Pampa and La Quiaca on RN 40.
• Cash: bring cash. No ATM in Lagunillas. In Abra Pampa there is one Banco Nación ATM with frequent failures.
• Cell signal: intermittent. Movistar has the best coverage in the area. Bring a radio or SOS if possible.
• Drinking water: buy in Abra Pampa, don't trust local lagoon water (saline).
• Insurance: use travel insurance with altitude coverage. Evacuating from the Puna is expensive.

See also: Salta & Jujuy hub, Humahuaca, San Salvador de Jujuy.