Animals

Imagining a place called "Death Valley" may spark imagery of an uninhabitable landscape: a drought-ravaged land with temperatures soaring above 120 degrees fahrenheit. Despite these seemingly harsh conditions, Death Valley is home to a great diversity of wildlife. Hard-learned clever adaptations enable desert animals to thrive in this unlikely place.

 

Learn More About Death Valley Wildlife:

 

 

Hottest, Driest, Lowest: How do Desert Animals Survive?

 

Desert Bighorn Sheep climbing mountain slopes.

NPS photo

Death Valley is one of the driest places on earth. Habitats with fresh water can be difficult to find, so some desert animals have evolved to simply drink less water. Roaming through mountains and canyons, bighorn sheep are able to go several days without drinking water, and can lose up to a third of their body weight due to dehydration. When water becomes available again, the sheep can drink several gallons at a time to rehydrate.

Like bighorn sheep, kangaroo rats do not have to worry about dehydration. In fact, they are so perfectly adapted to arid environments, they do not need to drink water their entire lives! They can survive on water digested from their seedy, vegetarian diet. Kangaroo rats conserve their body’s precious water by releasing wastes in very concentrated urine and dry feces.

 

Desert tortoise can live up to 80 years, yet most of their lives are spent sleeping in underground burrows.

NPS - Robb Hannawacker

While finding enough water is a challenge, coping with the fierce summer heat is a constant concern for desert inhabitants, after all Death Valley is the hottest place in the world. The desert tortoise is a champion of avoiding the heat. Unable to regulate its own temperature, the tortoise spends most of the year in its burrow, protected from extreme weather. Depending on the weather, desert tortoises might be active above ground for only three months of the year! During the hottest times, tortoises estivate, or enter a state of dormancy that allows them to conserve energy and save water, and desert tortoises hibernate to survive frigid winter temperatures.

Rather than “sleep” through most of the year, many animals rest during the hot summer days and are active at night. Nocturnal wildlife leaves behind clues on sand dunes. For example, you may find coyote tracks alongside those of a jackrabbit. The rabbit’s tracks zig and zag across the sand while the long strides of the coyote’s tracks portray a fast run. Hunting during the cool nights and early mornings allows the coyote to spend more energy catching prey. The cover of darkness also helps the jackrabbit hide from potential predators.

 

Jackrabbits use their big ears to cool their body temperature in hot weather.

NPS / K Monroe

While there are advantages to being nocturnal in the desert, there are still creatures who brave the daytime heat. Animals like the sidewinder rattlesnake and scorpion are known for being active in the desert, but other animals also get spotted in the Death Valley heat. These animals have specific physical adaptations which allow them to be out in the heat longer. Roadrunners, for instance, can operate in the heat of the day because their body temperatures are naturally high (104 °F).

The jackrabbit, another common desert creature, stays cool by releasing heat from its over-sized ears. When the rabbit retreats into the shade, warm blood from its core circulates through blood vessels in its ears, releasing body heat into the surrounding air.

Desert living is no easy task, but all animals that make their home in Death Valley have found a way to survive and thrive. Their adaptations overcome the daily challenges of finding food, water, and staying cool. “Helping” an animal by giving it food or other interactions can disrupt its way of life and usually does more harm than good. Desert dwellers are perfectly designed to live in Death Valley National Park. It is important that humans, as visitors to these creatures’ home, respectfully observe and enjoy from a distance.