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                Mohave Ground Squirrel

                Mohave Ground Squirrel

                Kingdom
                Phylum
                Subphylum
                Class
                Order
                Family
                Subfamily
                Tribe
                SPECIES
                Xerospermophilus mohavensis
                Population size
                over 100,000
                Life Span
                5-7.8 yrs
                WEIGHT
                85-130 g
                LENGTH
                210-230 mm

                The Mohave ground squirrel lives in the California desert and is amongst its more elusive inhabitants. They have highly developed survival skills for the desert which enable them to avoid this hostile climate’s extremes. Mohave ground squirrels are cryptically colored to match their sandy environment. It is very hard to find them and to observe and study them is even more difficult.

                Distribution

                The Mohave ground squirrel is a native of California’s northwest Mohave Desert. It inhabits open areas, like deserts, where there are many herbaceous, shrubby plants in sandy or gravelly soil, where they make their burrows.

                Geography

                Continents
                Countries
                Regions

                Climate zones

                Habits and Lifestyle

                Mohave ground squirrels are diurnal and solitary animals. When they emerge in the morning, they like in the sun to bask, periodically rotating their bodies to warm the different parts. They eat continuously during daylight hours, starting three hours after sunrise and going to one hour before sunset. If threatened, the squirrel will run, typically carrying its tail over its back. However, they rarely run for long distances, as they usually are close to their burrows. Their camouflage colors enable them, instead of fleeing, to stay still and blend into the environment. If disturbed when feeding, they stand up on their hind legs so they can survey the area better. Mohave ground squirrels typically enter dormancy between July and September until February, having built up their fat reserves, at a time when temperatures drop to 20 to 30 degrees Celsius and food sources decrease due to shortage of water.

                Diet and Nutrition

                The omnivorous Mohave ground squirrel mostly eats seeds, fungi, forbs and fruits; sometimes they eat caterpillars.

                Mating Habits

                MATING BEHAVIOR
                REPRODUCTION SEASON
                February-March
                PREGNANCY DURATION
                1 month
                BABY CARRYING
                4-9 kittens
                INDEPENDENT AGE
                32 days
                FEMALE NAME
                doe
                MALE NAME
                buck
                BABY NAME
                pup, kit, kitten

                Mohave ground squirrels are polygynous. The males emerge from dormancy up to two weeks before the females and may lay claim to and defend a territory in their attempt to mate with a number of females. The mating season is during February and March. Gestation lasts about one month and births are generally in late March or the beginning of April. Litters may number 4 to 9 babies. Kittens are usually blind when born and are also unable to hear, and they have hair only on their heads. They are usually weaned at around 32 days. Females are sexually mature at 1 year old (if conditions allow), and males usually not until two years of age.

                Population

                Population threats

                The Mohave ground squirrel is under threat by loss and degradation of its habitat as a result of urban and suburban development, also rural development, agriculture, livestock grazing, military activities, energy development and off-highway vehicles. Climate change will make the Mohave Desert even hotter and drier, and this could be another threat. For example, the Joshua tree, the seeds of which form a significant part of this squirrels’ diet, may move its range as a response to climate change.

                Population number

                According to the IUCN Red List, the total Mohave ground squirrel adult population size is unknown but may exceed 100,000 individuals. Currently this species is classified as Near Threatened (NT) and its numbers today are decreasing.

                Ecological niche

                Not much information is available about the ecosystem services provided by Mohave ground squirrels. They may provide seed dispersal, specifically for Joshua trees. The burrows constructed by they may contribute to soil aeration, based on similar practices by round-tailed ground squirrels.

                Fun Facts for Kids

                • Although usually silent, the Mohave ground squirrel can produce a low, shrill whistle and a high-pitched ‘peep’, and the young can make a high-pitched squeak, probably associated with feeding.
                • These squirrels occupy three different types of burrow: a home burrow for sleeping in during its active periods, an accessory burrow for thermoregulation and social interactions and an aestivation burrow, where for six or seven months it is in hibernation.
                • The Mohave ground squirrel’s burrows are typically about 1 meter deep and 5.5 meters long.
                • The squirrel is a symbol for the Native American for preparation, thriftiness and trust.
                • “Squirrel” comes from the Greek “skiouros”, which means “shadow tail.”
                • The four front teeth of a squirrel never stop growing. They are worn down when the squirrel chews nuts and tree bark.

                References

                1. Mohave Ground Squirrel Wikipedia article - https://en.wikipedia.org/wiki/Mohave_ground_squirrel
                2. Mohave Ground Squirrel on The IUCN Red List site - http://www.iucnredlist.org/details/20474/0
                3. Mohave ground squirrel illustration - https://creazilla.com/nodes/63240-mohave-ground-squirrel-vector

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