Manzanares and Mezquitosa ranches are managed primarily for it native wildlife, exotic animals such as cattle, sheep, goats have been banned from most parts of the ranches.

• Species of fauna found in these properties include :
• Mourning and Whitewing doves
• Bobwhite (Colinas Virginianus)
• Scaled (Callipella squamata) quail
• Badger (taxidea taxus)
• Coyote (Canis lantrans)
• Mountain lion (Puma concolor)
• Bobcat (Lynx rufus)
• Cottontail rabbit (Sylvilagus floridanus)
• Jack rabbit (Lepus californicus)
• Wild boar (Tayasu cajacu)
• Feral hogs
• Rio Grande wild turkeys

Whitetail hunting (Odocolileus virginianus texanus) which is the main course is restricted to mature animals only.