Road ecology blog: Wildlife overpass, Ruta 101, Misiones, Argentina.
There are no fences associated with this overpass that was constructed in 2008. It was built at a road cut in a ridge. This means that there are some steep and rocky slopes that may be a barrier to some animal species and that can help funnel wildlife to the overpass. However, the steep slopes cover only a few dozen meters, suggesting that they do not substantially reduce road mortality. Wildlife use can be high though for crossing structures, regardless of the length of a potential fence. On top of the overpass a "pathway" has been constructed to encourage wildlife use. Cameras have recorded a variety of species on the overpass, including: six-banded armadillo (Euphractus sexcinctus), white-eared opossum (Didelphis albiventris), Azara's agouti (Dasyprocta azarae), southern tamandua (Tamandua tetradactyla), South American coati, or ring-tailed coati (Nasua nasua), jaguarundi (Puma yagouaroundi), ocelot (Leopardus pardalis), crab-eating fox (Cerdocyon thous), lesser grison (Galictis cuja), crab-eating raccoon (Procyon cancrivorus), pygmy brocket (Mazama nana), and red brocket (Mazama americana).
For other images of wildlife overpasses (wildlife only) click here.
For images of multifunctional wildlife overpasses (wildlife, water, humans, non-motorized vehicles, motorized vehicles) click here.
For images of landscape bridges, road tunnels or very wide overpasses over longer road sections click here.
Click here for images of multifunctional underpasses.
Click here for images of wildlife underpasses.
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