Road Ecology blog: Boardwalk through forest, Fern Forest Nature Center, Coconut Creek, Florida.

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Boardwalk through forest, Fern Forest Nature Center, Coconut Creek, FloridaBoardwalk through forest, Fern Forest Nature Center, Coconut Creek, Florida

Road Ecology blog: Gradual approach of wildlife overpass, Hwy 69, Ontario, Canada.

Most road ecologists consider it important that the approach to overpasses or underpasses is gradual. Wildlife may more readily accept and use underpasses and overpasses when they can see what is on the other side. 

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Gradual approach of wildlife overpass, Hwy 69, Ontario, CanadaGradual approach of wildlife overpass, Hwy 69, Ontario, Canada. The overpass has art (drawings of animals) on the side, visible to people traveling the highway. The top of the overpass is landscaped with trees, shrubs, and brush and rock to provide cover for animals. Elk (Cervus canadensis), moose (Alces alces), Black bear (Ursus americanus) and white-tailed deer (Odocoileus virginianus) are among the target species.The overpass has a gradual approach (slope) for animals that approach the structure from the surrounding landscape. The wildlife overpass cost about CAN$ 3.9 million.

Northeast wildlife: Boy meets melanistic eastern gartersnake, Science North, Sudbury, Ontario, Canada.

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Boy meets melanistic eastern gartersnakeBoy meets melanistic eastern gartersnake

(Thamnophis sirtalis), Science North, Sudbury, Ontario, Canada

Boy meets melanistic eastern gartersnakeBoy meets melanistic eastern gartersnake

(Thamnophis sirtalis), Science North, Sudbury, Ontario, Canada

Boy meets melanistic eastern gartersnakeBoy meets melanistic eastern gartersnake

(Thamnophis sirtalis), Science North, Sudbury, Ontario, Canada

Road Ecology blog: Visual barrier above wildlife underpass, near "Aardhuis" along N344, Amersfoortseweg, Hoog Soeren, The Netherlands. The fences reduces visual disturbance (moving vehicles, light) and possibly some of the traffic noise as animals approach the underpass. Note that the fence is painted black to absorb as much light as possible.

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Visual barrier above wildlife underpass, near "Aardhuis" along N344, Amersfoortseweg, Hoog Soeren, The NetherlandsVisual barrier above wildlife underpass, near "Aardhuis" along N344, Amersfoortseweg, Hoog Soeren, The Netherlands.

Northeast wildlife: Northern flying squirrel (Glaucomys sabrinus), Science North, Sudbury, Ontario, Canada.

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Girl pets northern flying squirrel (Glaucomys sabrinus), Science North, Sudbury, Ontario, CanadaGirl pets northern flying squirrel (Glaucomys sabrinus), Science North, Sudbury, Ontario, Canada

Northern flying squirrel (Glaucomys sabrinus), Science North, Sudbury, Ontario, CanadaNorthern flying squirrel (Glaucomys sabrinus), Science North, Sudbury, Ontario, Canada

Road Ecology blog: Barrier for animals, sound and light on top of wildlife overpass, Hwy 69, Ontario, Canada. The barrier keeps the animals from jumping down on the highway below. In addition, the barrier blocks visual disturbance and some noise from the traffic below. In this case, the physical, visual and sound  barrier are all integrated into one.

The overpass has art (drawings of animals) on the side, visible to people traveling the highway. The top of the overpass is landscaped with trees, shrubs, and brush and rock to provide cover for animals. Elk (Cervus canadensis), moose (Alces alces), Black bear (Ursus americanus) and white-tailed deer (Odocoileus virginianus) are among the target species. The overpass has a gradual approach (slope) for animals that approach the structure from the surrounding landscape. The wildlife overpass cost about CDN$ 2.9 million.

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Barrier for animals, sound and light on top of wildlife overpass, Hwy 69, Ontario, CanadaBarrier for animals, sound and light on top of wildlife overpass, Hwy 69, Ontario, Canada. The overpass has art (drawings of animals) on the side, visible to people traveling the highway. The top of the overpass is landscaped with trees, shrubs, and brush and rock to provide cover for animals. Elk (Cervus canadensis), moose (Alces alces), Black bear (Ursus americanus) and white-tailed deer (Odocoileus virginianus) are among the target species.The overpass has a gradual approach (slope) for animals that approach the structure from the surrounding landscape. The wildlife overpass cost about CAN$ 2.9 million.

Northeast wildlife: Red-eared slider (Trachemys scripta elegans), Science North, Sudbury, Ontario, Canada.

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Red-eared slider (Trachemys scripta elegans), Science North, Sudbury, Ontario, CanadaRed-eared slider (Trachemys scripta elegans), Science North, Sudbury, Ontario, Canada

Road Ecology blog: Locked gate to access wildlife overpass (about 30 m wide), Hwy 69, Ontario, Canada.

This gate does not open when substantial snow has accumulated on the ground. This means researchers have to climb the fence in order to conduct their work. However, there are ways to avoid this problem. Steps may lead up to a gate that is situated about 1 m above the ground. A less expensive alternative is to have split gates, as suggested by Trevor Kinley from Parks Canada. The lower half of a gate goes up to the expected snow level, and the upper half extends to the height of the wildlife fence. In summer the upper and lower half of the gate can be locked together so the entire gate opens and closes as one. In winter the upper and lower half can be disconnected, allowing only the upper half of the gate to swing open over the accumulated snow.

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Locked gate to access wildlife overpass (about 30 m wide), Hwy 69, Ontario, CanadaLocked gate to access wildlife overpass (about 30 m wide), Hwy 69, Ontario, Canada. Gate does not open when substantial snow has accumulated on the ground.

Montana landscapes: Evening canoeists at Bowman Lake, Glacier National Park.

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Evening canoeists at Bowman Lake, Glacier National Park, Montana, USAEvening canoeists at Bowman Lake, Glacier National Park, Montana, USA

Road ecology blog: Top of wildlife overpass with cover (tree branches and rocks), Hwy 69, Ontario, Canada.

Root wads, tree branches and rocks provide cover for invertebrates, amphibians, reptiles and small mammals. In general, these species groups do not cross open areas readily;it makes them quite vulnerable to predation. The cover allows these animals to live on top of the overpass and also cross to the other side of the highway.

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Top of wildlife overpass with cover (tree branches and rocks), Hwy 69, Ontario, CanadaTop of wildlife overpass with cover (tree branches and rocks), Hwy 69, Ontario, Canada. The overpass has art (drawings of animals) on the side, visible to people traveling the highway. The top of the overpass is landscaped with trees, shrubs, and brush and rock to provide cover for animals. Elk (Cervus canadensis), moose (Alces alces), Black bear (Ursus americanus) and white-tailed deer (Odocoileus virginianus) are among the target species.The overpass has a gradual approach (slope) for animals that approach the structure from the surrounding landscape. The wildlife overpass cost about CAN$ 2.9 million.

Montana landscapes: Bowman Lake in last light, Glacier National Park.

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Bowman Lake in last light, Glacier National Park, USABowman Lake in last light, Glacier National Park, USA

Sunset at Bowman Lake, Glacier National Park, Montana, USASunset at Bowman Lake, Glacier National Park, Montana, USA

Road Ecology blog: No tresspassing sign and wildlife cameras at wildlife overpass, Hwy 69, Ontario, Canada.

Human co-use is generally associated with reduced wildlife use of crossing structures. However, if the structure is located in a multifunctional landscape and if the target species are not particularly sensitive to human disturbance, consider combining non-motorized human and wildlife use. The cameras record wildlife that uses the ecoduct to get to the other side of the road.

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No tresspassing sign at wildlife overpass, Hwy 69, Ontario, CanadaNo tresspassing sign at wildlife overpass, Hwy 69, Ontario, Canada. The overpass has art (drawings of animals) on the side, visible to people traveling the highway. The top of the overpass is landscaped with trees, shrubs, and brush and rock to provide cover for animals. Elk (Cervus canadensis), moose (Alces alces), Black bear (Ursus americanus) and white-tailed deer (Odocoileus virginianus) are among the target species.The overpass has a gradual approach (slope) for animals that approach the structure from the surrounding landscape. The wildlife overpass cost about CAN$ 2.9 million.

No tresspassing sign and wildlife cameras at wildlife overpass, Hwy 69, Ontario, CanadaNo tresspassing sign and wildlife cameras at wildlife overpass, Hwy 69, Ontario, Canada. The overpass has art (drawings of animals) on the side, visible to people traveling the highway. The top of the overpass is landscaped with trees, shrubs, and brush and rock to provide cover for animals. Elk (Cervus canadensis), moose (Alces alces), Black bear (Ursus americanus) and white-tailed deer (Odocoileus virginianus) are among the target species.The overpass has a gradual approach (slope) for animals that approach the structure from the surrounding landscape. The wildlife overpass cost about CAN$ 2.9 million.

Montana landscapes: Mountains and sky, Bowman Lake, Glacier National Park

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Mountains and sky, Bowman Lake, Glacier National Park, Montana, USAMountains and sky, Bowman Lake, Glacier National Park, Montana, USA