NATURAL RESOURCES
Flora
In the Reserve three big natural environment can be found. Next to the river it is the “Ribereño” Scrubland, with middle high tress –like “ceibos” that are wonderful when they are covered by red flowers during the spring-, creole willows and cannelloni.
In flood's terrains, by the river, the dominant vegetation is the “pajonal” that consists of big herbs stains (rushes, “totoras”, brave straws and “espadañas”).
The opened water mirrors have floating plants like watered little cabbage. Over the Lujan River valley there is salty grass mixed with “hunquillo” brushes. Over the old Parana precipice there are tree-felling forests.
Following to the west, over the precipice, a little sample of the “pastizal pampeano”, typical from the Pampa Ondulada can be found. It is covered by grass (“gramineas”), like “flechillas” and wolf's tails.
The typical birds of the “Ribereño” Scrubland are the black “boyero”, which makes a suspension nest made by vegetables, the “choca corona rojiza” and the “pava del monte”.
The “pajonal” brings refuge to the biggest fauna of the Reserve, like the marsh stag and the “carpincho”. The birds that can be found there are the “junquero”, the seven colours, the federal, which has black plumage and red crest, and other species of “gallinetas” and “burritos”. There many amphibious species like the Creole frog. In the watered mirrors live fishes like “tarariras” and shads, and aquatics plants like “galleretas”, ducks and swans.
The salty grass with bushes of “hunquillos” keeps the typical birds like the short “espartilleros”.
In the tree felling forests, over the old precipice of the Parana River, lives the black weasel and birds like the little “chinchero” and the blue “tacuarita”, bird that travels across the forests making acrobatic movements.
In the “pastizal pampeano” little sample the “misto” can be observed. It is a bird that in spring is perceptible by his sing and the movements that makes.
Geology and relief's
Otamendi Natural Reserve is located in a geological province called “Chacopampeana”, inside the ambient called “Pampa ondulada”. The most outstanding morphological feature are the high and low terraces, both separated by a marcable drop that constituted a “paleoacantilado”. Geologically in the high terrace grows “loess” and “limos” with a wind origin that were accumulated in the “Pleistoceno”. In the low terrace accumulates sandy, “limoarcillosos” and “limoarenosos” deposits, caused by marine and fluvial “morfogenicos” agents during the “Oloceno”.
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