Bighorn sheep (Ovis canadensis), seen on my morning walk in in Phoenix, Arizona. 

These sheep are actually denizens of the Phoenix Zoo, in Papago Park. Geologically, the park comprises a grouping of sandstone monadnocks – isolated hills of red rock that rise abruptly from the surrounding terrain. The zoo has built its bighorn enclosure on the side of the southernmost hill – visible from the park’s trails, and a pleasant surprise for the urban hiker. 

Bighorn sheep (Ovis canadensis), seen on my morning walk in in Phoenix, Arizona. 

These sheep are actually denizens of the Phoenix Zoo, in Papago Park. Geologically, the park comprises a grouping of sandstone monadnocks – isolated hills of red rock that rise abruptly from the surrounding terrain. The zoo has built its bighorn enclosure on the side of the southernmost hill – visible from the park’s trails, and a pleasant surprise for the urban hiker.