Look carefully in the picture and you will see some trash left by tourists, even hundreds of kilometers from nearest city you can city traces of human presence.

The Andean flamingo (Phoenicopterus andinus) is one of the rarest flamingos in the world. It lives in the Andes Mountains of South America. The flamingo has a pale pink body with brighter upperparts, deep vinaceous-pink lower neck, breast, and wing-coverts. It is the only flamingo species with yellow legs and three-toed feet. The bill of the Andean flamingo is pale yellow and black.

These flamingos are filter-feeders and their diet ranges over the entire spectrum of available foods, from fish to invertebrates, from vascular plants to microscopic algae.

The flamingos feed from the bottom layer of the lake for small particles, mainly diatoms. They have a deep-keeled bill; the upper mandible is narrower than the lower, creating a gape on the dorsal surface of the bill. The bill morphology facilitates feeding of diatoms through inertial impaction. This mechanism entails that food particles denser than water, such as diatoms, would impact the filtering surface in the bill causing water to flow out of the mouth and leaving diatoms in the flamingo’s bill. The flamingos forage in shallow salty waters for resources. They exhibit the most flexible foraging pattern compared to that of the Chilean and James's flamingos.