What is Animal Bridges

Roads, highways, railways, and pipelines are infrastructure projects that enable people and commodities to move from one place to another. Like veins in the human body are required to move blood flow, rail and roads are the veins of the country, helping the economic activity.

That’s where the comparison ends; veins in the human body don’t obstruct other body organs. The man-made paths do.

Transport infrastructure crisscrosses through the wildlife and biodiversity-ecosystem, and when animals living in this ecosystem need to cross the man-made division, they have to risk their lives.

Vehicles or trains hitting an animal while moving from one place to another happen more often than most of us would imagine.

Many times, the collision results in serious injuries to the animals, like bone fractures or other injuries, which leave them vulnerable to a slow and painful death.

In addition, collisions not only injure the animals but can also cause extensive harm to humans. At times, to avoid collisions with animals, vehicle drivers had to make sudden breaks or quick diversions, resulting in major accidents.

Alarming statistics on roadkill – Animal collisions with Vehicles

According to some estimates, in the United States, millions of wild animals are killed by vehicles each year. As per National Geographic, “In the United States, there are 21 threatened and endangered species whose very survival is threatened by road mortalities, including Key deer in Florida, bighorn sheep in California, and red-bellied turtles in Alabama.”

NRMA Insurance in Australia says approximately 90 per cent of the vehicle-to-animal hits involve kangaroos. In 2019, 9404 of the 10,969 incidents in Australia’s New South Wales involved kangaroos.

According to the State of India’s Environment (SoE) in 2018, 83 leopards lost their lives in rail or road accidents, a lion died in a road accident, while three lions died in rail accidents. The same year 11 spotted deer died in road mishaps.

Additionally, wildlife collisions cost millions of dollars annually in the form of traffic roadblocks, road maintenance, spot tidiness, vehicle repairs, and veterinary services, among others. 

A solution in the form of Animal Bridges and Wildlife Crossings

Researchers have converged on a solution that is acceptable to both environmentalists and infrastructure developers: Animal Bridges.

The technical name for animal bridges is wildlife crossings, which are structures that allow the connections between habitats that get divided by man-made fragmentation. They provide a safe passage for the animals under the roads or over the highways or railway lines.

For example, if a road or a railway line is constructed through a forest, an animal bridge is also developed so that animals can move without too much interruption.

A simple example of wildlife crossing is when a bridge is created over a road or railway line. 

Wildlife crossings started in European countries in the 1950s when the first animal bridge was built in France as an infrastructure solution to ensure safe passage to wild animals.

Over the years, these dedicated bridges for animals became hugely popular in Germany, the Netherlands, Canada, and the USA.

The Netherlands has more than 50 different animal crossings.

Canada – Banff National Park

Banff National Park in Canada has more than 40 wildlife crossings. A study conducted has indicated an over 80% reduction in animal-to-vehicle collisions after constructing the bridges.

Australia’s Crab Bridge

Australia’s Christmas Island has built a few underpasses and overpasses that help millions of crabs during their mass migration. Roughly 50 million red crabs make this annual migration to the seaside from their forest homes in November and December.

Volunteers and workers place barriers along the sides of the roads, to direct the little crabs towards the overpass.

India’s Wildlife Crossing

With the rising awareness of wildlife conservation, India is the latest to adopt this innovative solution aimed at reducing wildlife-vehicle collisions.

The under-construction Delhi-Mumbai expressway will see multiple animal overpasses. The approximately 1300 km greenfield project passes through multiple wildlife sanctuaries  such as Ranthambore and Mukundra Hills. The animal passages will be on the lines of those seen in the Netherlands, planted with native trees so that animals find passing natural.

In 2018, India constructed many underpasses beneath a stretch of National Highway 44, India’s longest highway from Srinagar to Kanyakumari. The highway passes through the country’s most important wildlife corridors, between Kanha and Pench tiger reserves in Madhya Pradesh and Maharashtra.

Wrapping Up

Animal bridges help reduce collisions and aid wildlife species in finding resources like food, shelter, and mates that are found on the other side. In the absence of these wildlife crossings, animals will be left without sufficient food, reduced reproductivity success, or possible extinction.

All in all, we hope that countries and societies do not forget that we live with many other important creatures, and we should ensure that our selfish interests do not contravene their lives.