jessica moreno: we have black bear, cottontail rabbits, pygmy owl, javelina, mountain lion, cougar.h this 120,000 square mile region-- you have the mountains and the wildlife juxtaposed with sprawling urban communities for highways, freeways, that sort of thing. johnny devenanzio (voiceover): it's up to conservationists like jessica moreno to ensure that the desert remains a safe haven for our four-legged friends. as we grow and build more roads, we're going to lose the wildlife. and as soon as you start to lose species like that, the health of the entire ecosystem fails. and that impacts our air quality, and it impacts our water quality, and other things that we actually really rely on. johnny devenanzio (voiceover): so in an attempt to prevent this and protect wildlife from our human footprint, jessica and her team came up with a solution. camille: so danny, this is the first wildlife bridge in the sonoran desert. johnny devenanzio: wow! camille: wildlife crossings like this bridge help wildlife cross safely. and we're actually reducing wildlife vehicle collisions as well. we also