At the Nature Conservancy Patagonia–Sonoita Creek Preserve, 1,350 acres of cottonwood-willow riparian habitat are protected along the Patagonia–Sonoita Creek watershed. More than 275 bird species have been sighted here, along with white-tailed deer, javelina, coatimundi (raccoonlike animals native to the region), desert tortoise, and snakes. There's a self-guided nature trail, and guided walks are occasionally offered (call to inquire). Three concrete structures near an elevated berm of the Railroad Trail serve as reminders of the land's former use as a truck farm. The admission fee is good for seven days.