Introduction An ecosystem can be described as an environment that is biological and includes all living organisms that could be found in that area. It also includes physical components, which are nonliving, in the area. Examples include the air, sunlight, water and soil. It also describes how the biological organisms interact with these nonliving things in their habitat. Therefore, a desert ecosystem can simply be described as living organisms in a desert together with how they interact with their desert environment. This ecosystem is present in most parts of the world. It can as well be found in the United State of America, especially North America. These deserts are mostly found between the east of Sierra Mandrel Oriental and the mostly Rocky Mountains. There is also the Transverse, Peninsular Ranges and Sierra Nevada that are majorly due to the western rain shadow. To cut the chase, there are about 3 greatest deserts in North America. Chihuahuan Desert covers Texas, Mexico, Arizona and New Mexico and is about 140,000 sq miles. Sonoran Desert covers California, Mexico and Arizona and is approximately 120,000 sq miles. Mojave Desert covers Utah, Nevada, California and Arizona and is about 22,000 sq miles (Defenders, 2007). Others include Alvord Desert in the County of Harney south-eastern parts of Oregon, Amargosa in Nevada County of Nye and Baja in California. Desert climate could be defined as one that does not stand a chance of being classified as polar climate. It is thus characterized by very low amounts of precipitation which is always not enough to enable the proper blossoming of vegetation and hence the term arid climate. Precipitation in desert areas would mostly be less than 250mm each year. Although some area might experience more than 250 mm of precipitation, these areas would end up losing more in form of vapor and hence end up still retaining their desert nature. The mean temperature varies from an average of 18 0 C for hot deserts to between 0 and -3 0 C for cold deserts. Additionally, these desert environments would always have an annual precipitation The type of vegetation in this ecosystem has drastically been made to adapt to these harsh climatic conditions. Therefore, these many plants have ended up thriving in these conditions. Such an example is the famous cactus called saguaro which could be found mostly in the Sonoran desert. Other cactus plants include prickly pear organ pipe and many others. Shrubs are also found in these places for example the desert sunflower in the Baja California. Xeric shrubs can also be found in these ecological regions. They however create some varied associations that are based on conditions of the soil and the general elevation. Therefore to summaries, these desert ecosystems would normally have shrubs and cactus forming the major part of their vegetation. Just like any other place, there would be animals that are specially adapted to these desert conditions. Snakes and lizards form the first batch of wildlife that is adapted to these harsh climatic conditions. This is due to their ability to survive scarce water conditions due to their thick hardy skin or sometimes spiny to prevent water loss. Some of the other animals in the desert include the Mex