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Big Sky Connection - Wildlife crossings to reduce roadway collisions can play a key role in ensuring wildlife can migrate as the climate changes – but this infrastructure could also be affected by the changing climate. Comments from Anna Wearn ("wern"), director of government affairs, Center for Large Landscape Conservation; and Matt Skroch ("scraw"), project director for U.S. Public Lands and Rivers Conservation with The Pew Charitable Trusts.

Click on the image above for the audio. Properly designed crossings reduce wildlife-vehicle collisions by up to 90%, according to experts. (MierCat Photography/Adobe Stock)

Eric Tegethoff

February 15, 2023 - Wildlife crossings could be a path to a future where the climate has significantly changed the planet. Wildlife and climate experts are urging policymakers to plan for what they call "climate-informed" crossings.

More than a dozen experts have released a letter highlighting the effects climate change will have on these crossings to reduce roadway collisions - and the benefit this infrastructure will have as wildlife migrates northward.

Anna Wearn - director of government affairs with the Bozeman-based Center for Large Landscape Conservation - said extreme weather, like the floods around Yellowstone National Park last year, damaged traditional infrastructure.

"So for instance," said Wearn, "if a stream culvert is installed beneath a road without anticipating the magnitude of future floods, it may be built too small to properly control high flows or allow fish to pass through."

Wearn said crossings should be located in areas with the greatest potential to protect high-quality habitats so that wildlife can move across large landscapes.

In general, wildlife is expected to move toward the poles as the climate heats up in the coming decades. Congress's Infrastructure Investment and Jobs Act include $350 million for wildlife crossings.

Matt Skroch is the project director for the U.S. Public Lands and Rivers Conservation at Pew Charitable Trusts. He noted that flooding has increased recently, and said building infrastructure to accommodate it can serve many purposes.

"We can think about how we can design those structures," said Skroch, "to not only facilitate the passage of water as flooding continues to occur in the future, but we can also think about how these culverts and bridges can also accommodate terrestrial wildlife movement as well."

He said the letter from experts is a message that wildlife crossings are important tools as the nation and states think about strategies to respond to climate change.

They've made some policy recommendations, including planning for long-term resilience and promoting equitable participation across governments and tribes.

Support for this reporting was provided by The Pew Charitable Trusts.