The Sky Islands, encompassing more than thirty mountain ranges, are recognized as a globally-significant biodiversity hotspot, however, the valleys connecting the ranges are highly threatened by development and fragmentation. 
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As a segment of the larger Sonoita Creek Wildlife Corridor, the more than 1,800 acre Borderlands Wildlife Preserve co-managed by BRN and Wildlife Corridors, LLC is permanently protected and managed to conserve critical wildlife habitat, maintain a route for migratory species, as well as provide hiking trails for the public.