Roadkill is an animal or animals that have been struck and killed by drivers of motor vehicles. Wildlife-vehicle collisions (WVC) have increasingly been the topic of academic research to understand the causes, and how it can be mitigated.
Essentially non-existent before the advent of mechanized transport, roadkill is associated with increasing automobile speed in the early 20th century. In 1920, naturalist Joseph Grinnell wrote of his observations in the state of California that "this is a relatively new source of fatality; and if one were to estimate the entire mileage of such roads in the state, the mortality must mount into the hundreds and perhaps thousands every 24 hours."
In Europe and North America, deer are the animal most likely to cause vehicle damage. In Australia, specific actions taken to protect against the variety of animals that can damage vehicles – such as bullbars (usually known in Australia as 'roo bars', in reference to kangaroos) – indicate the Australian experience has some unique features with road kill.
The development of roads affects wildlife by altering and isolating habitat and populations, deterring the movement of wildlife, and resulting in extensive wildlife mortality. One writer states that "our insulated industrialized culture keeps us disconnected from life beyond our windshields." Driving "mindlessly" without paying attention to the movements of others in the vehicle's path, driving at speeds that do not allow stopping, and distractions contribute to the death toll. Moreover, a culture of indifference and hopelessness is created if people learn to ignore lifeless bodies on roads.
A study in Ontario, Canada in 1996 found many reptiles killed on portions of the road where vehicle tires do not usually pass over, which led to the inference that some drivers intentionally run over reptiles. To verify this hypothesis, research in 2007 found that 2.7% of drivers intentionally hit reptile decoys masquerading as snakes and turtles. Several drivers were seen to speed up when aiming for the decoys.
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vignette|upright=1.5|Écoduc de type « passage supérieur », enjambant les quatre voies de l'autoroute A50 aux Pays-Bas. vignette|Vidéo par drone du Kolu écoduc (Estonia). Les écoducs (aussi nommés , , ou « pont à bestiaux » ou encore « écoponts ») sont des passages construits ou « réservés » dans un milieu aménagé, pour permettre aux espèces animales, végétales, fongiques de traverser des obstacles construits par l'être humain ou résultant de ses activités (agriculture, sylviculture, extraction...).
Habitat conservation is a management practice that seeks to conserve, protect and restore habitats and prevent species extinction, fragmentation or reduction in range. It is a priority of many groups that cannot be easily characterized in terms of any one ideology. For much of human history, nature was seen as a resource that could be controlled by the government and used for personal and economic gain. The idea was that plants only existed to feed animals and animals only existed to feed humans.
L’expression corridor biologique (ou « biocorridor ») ou corridor écologique désigne un ou des milieux reliant fonctionnellement entre eux différents habitats vitaux pour une espèce, une population, une métapopulation ou un groupe d’espèces ou métacommunauté (habitats). Ces unités qui tranchent dans l'espace environnant en raison de leur configuration linéaire relativement étroite, de caractère végétal (haies, chemins et bords de chemins, ripisylves...), topographique (vallon, cours d’eau...