The Atascosa Highlands are an area of incredible biological diversity located within one of the most ecologically rich regions on the planet. Taking up less than 1% of Arizona's overall landmass, the Atascosas host at least half of the state’s total bird species and approximately one-quarter of its flora, including several species which are found nowhere else in the United States. -from the Atascosa Borderlands Project opening statement, Dash & Swenson