Beasts of burden: Skittish mules vital to survival of Saguaro National Park
Feeding Donkeys & Mules
Myths and Facts about Wild Horses and Burros
Wild Donkeys — Skydog Ranch & Sanctuary
Mule - Description, Habitat, Image, Diet, and Interesting Facts
Mules and Donkeys: Understanding and Appreciating Their Versatility and Athletic Abilities
Mules for Sale — How to Buy A Mule or Donkey On Craigslist or At Auction
These firefighting mules go where trucks and helicopters cannot - YouTube
42 wild burros are dead in the Mojave Desert, and there's a $50,000 reward - The Washington Post
U.S. Forest Service Packers Serve Fire Crews - Western Horseman
Where to see wild burros in AZ: Alamo HMA | American Wild Horse Campaign
Federal wild horse and burro sale in Abilene this weekend
Death Valley's Park Service Wants Them Gone. But Are Wild Donkeys Really the Enemy?
The cowboy way: Unpredictable mules vital to survival in Arizona's remote Saguaro National Park
Fight Against California Wildfires Uses Mules as Well as Modern Technology to Aid Firefighters
Are Mules, Burros and Jackasses All Donkeys? | HowStuffWorks
Why Are Mules Sterile? - Grit
History of the Mule - American Mule Museum
A Woman and Her Mule in the Backcountry | Sierra Club
Lost Meadows Mule Refuge
