Flora and fauna

Flora
Subtropical plants dominate the north, part of the Gran Chaco region of South America. The genus Dalbergia of trees is well disseminated with representatives like the Brazilian Rosewood and the quebracho tree; also predominant are white and black algarrobo trees (prosopis alba and prosopis nigra). Savannah-like areas exist in the drier regions nearer the Andes. Aquatic plants thrive in the wetlands dotting the region.


In central Argentina the humid pampas are a true tallgrass prairie ecosystem. The original pampa had virtually no trees; today along roads or in towns and country estates (estancias), some imported species like the American sycamore or eucalyptus are present. The only tree-like plant native to the pampa is the ombú, an evergreen. The surface soils of the pampa are a deep black color, primarily humus, known commonly as compost. It is this which makes the region one of the most agriculturaly productive on Earth. However, this is also responsible for decimating much of the original ecosystem, to make way for commercial agriculture. The western pampas receive less rainfall, this dry pampa is a plain of short grasses or steppe.
Most of Patagonia in the south lies within the rain shadow of the Andes. The flora, shrubby bushes and plants, is well suited to withstand dry conditions. The soil is hard and rocky, making large-scale farming impossible except along river valleys. Coniferous forests grow in far western Patagonia and on the island of Tierra del Fuego. Conifers native to the region include alerce (Fitzroya cupressoides), ciprés de la cordillera (Austrocedrus chilensis), ciprés de las guaitecas (Pilgerodendron uviferum), huililahuán (Podocarpus nubigenus), lleuque (Prumnopitys andina), mañío hembra (Saxegothaea conspicua), and pehuén (Araucaria araucana), while native broadleaf trees include several species of Nothofagus including coigüe or coihue, lenga (Nothofagus pumilio), ñire (Nothofagus Antarctica). Other introduced trees present in forestry plantations include spruce, cypress, and pine. Common plants are the copihue and colihue (Chusquea culeou).
In Cuyo, semiarid thorny bushes and other xerophile plants abound. Along the many river oasis, grasses and trees grow in significant numbers. The area presents optimal conditions for the large scale growth of grape vines. In the northwest of Argentina there are many species of cacti. In the highest elevations (often above 4,000mts), no vegetation grows because of the extreme altitude, and the soils are virtually devoid of any plant life.
The ceibo flower, of the tree Erythrina crista-galli, is the national flower of Argentina.

Fauna

Many species live in the subtropical north. Big cats like the jaguar, cougar, and ocelot; primates (howler monkey); large reptiles (crocodiles), and a species of caiman. Other animals include the tapir, capybara, giant anteater, peccary, bush dog, raccoon, maned wolf, and various species of turtle and tortoise. There are many birds, notably hummingbirds, flamingos, toucans, and parrots.


The central grasslands are populated by the armadillo, pampas cat, mara and the rhea (ñandú), a flightless bird. Hawks, falcons, herons, partridges inhabit the region. There are also deer and foxes. Some of these species extend into Patagonia.
The western mountains are home to different animals. These include the llama, guanaco, vicuña, among the most recognizable species of South America. Also in this region are the fox, viscacha, Andean Mountain Cat, kodkod and the largest flying bird in the New World, the Andean Condor.
Southern Argentina is home to the cougar, huemul, pudú (the world's smallest deer), and introduced, non-native wild boar. The coast of Patagonia is rich in animal life: elephant seals, fur seals, sea lions, and species of penguin. The far south is populated by cormorant birds.
The territorial waters of Argentina have abundant ocean life; mammals such as dolphins, orcas, and whales like the southern right whale, a major tourist draw for naturalists. Sea fish include sardines, argentine hakes, dolphinfish, salmon, and sharks; also present are squid and spider crab (centolla) in Tierra del Fuego. Rivers and streams in Argentina have many species of trout and the South American dorado fish. Outstanding snake species inhabiting Argentina include boa constrictors, and the very venomous yarará pit viper and South American rattle snake.