Nahuel Huapi National Park - Flora and Fauna

Flora and Fauna

The park's ecology consists of Patagonian steppe at lower elevations and Valdivian temperate forests at higher elevations. It is notable for its rich wildlife due to its many biotopes, attributed to the varied altitude and precipitation range.

Flora

Xerophytic Patagonian flora is dominant in the eastern half of the park while the western half is covered profusely with temperate rain forests. The dominant tree species in the park are the lengas, coihue, and the ñires. Other varieties of trees seen in the park are the Chilean cedar (Austrocedrus chilensis), Winter’s bark (Drimys winteri), Myrceugenella apiculata, Lomatia ferruginea, Lomatia hirsuta, Alstroemeria aurantica, Fuchsia megellanica, bamboo Chusquea culcou, Mitraria cocinea and Embothrium coccineum. The alerce or Patagonian cypress is a slow-growing conifer which is also present. Other flora include arrayanes, coihues, ferns, the caña colihue reeds, amancayes and arvejillas. The llao llao fungus has irregular growth patterns on the trees and is a symbol of the area; it is also the name of the Llao Llao Hotel, a famous resort. The Valdivian rain forests is well forested with fine arrayan trees with crumbling bark. In the high rain fall zones close to the Chilean border there is profusion of 450 years old coihue trees (small leaved evergreen beeches). alerce South American Spanish name) of 1500 year vintage are seen spread throughout the park. Bamboo cane grows in abundance.

Fauna

Animals include river otters (Lontra longicaudis), southern Andean huemuls (Hippocamelus bisulcus), pudus (small deer), foxes, cougars, guanacos and maras. Huillin (Lontra provocax), an endangered native otter, has been reported in the park. Avifauna reported include Magellanic Woodpeckers, green Austral Parakeets, geese, ducks, swans, blue-eyed cormorants, Andean condors (Vultur gryphus) and Green-backed Firecrowns (Saphonoides sephaniodes). Amphibian fauna reported are Hylorina sylvatica and Bufo spinolosus. Five genera and 32 species of Simuliidae (black fly) have been recorded. These genera are Cnesia, Cnesiamima, Gigantodax, Paraustrasimulium, and Simulium (Pternaspatha), a subgenus of Simulium with 19 species; these account for 57% of the Simuliidae fauna found in Argentina.

Nahuelito is a lake monster named after the Nahuel Huapi Lake as its sighting in the lake is reported widely. Whether it is a fact or fiction, its sighting has been reported by local people and tourists with widely varying descriptions mentioning a “giant water snake with humps and fish-like fins to a swan with a snake's head, the overturned hull of a boat, and the stump of a tree”. Its length is also reported in the range of 15–150 feet (4.6–46 m). Reported widely since the 1920s, predating Nessie and the book titled The Lost World (Arthur Conan Doyle), Nahuelito is described as “an Argentinean media star.”