UN 1994 ORIGINAL ARTWORK ADOPTED DRAWING RODENT MEXICAN PRAIRIE DOG Sc246 UNIQUE

Description: UNITED NATIONS GENEVA 1994 ENDANGERED SPECIES, 80c RODENTS - MEXICAN PRAIRIE DOG - ORIGINAL ARTWORK 1994 UNITED NATIONS - GENEVA, ENDANGERED SPECIES - artist's drawing, large (226 x 161mm) for proposed 80c design “MEXICAN PRAIRIE DOG”, acrylic on art board, size (280 x 254 mm), artist "Leon Parson".THE ISSUED STAMP IS SHOWNDESIGN BY LEON PARSON AND SIGNED BY THE ARTISTScott Geneva # 246(THEMATIC - FAUNA, ANIMALS, MAMMALS, RODENTS) RODENTS - a gnawing mammal of an order that includes rats, mice, squirrels, hamsters, porcupines, and their relatives, distinguished by strong constantly growing incisors and no canine teeth. They constitute the largest order of mammals. Unique and truly spectacular showpiece!!! MEXICAN PRAIRIE DOG (Cynomys mexicanus)Also known as MEXICAN PRAIRIE MARMOT“The Mexican prairie dog (Cynomys mexicanus) is endemic to Mexico in a restricted range of approximately 500 km² in northwestern Mexico, in the states of Coahuila, Nuevo Leon, and San Luis Potosi. Historically, they were also found in the state of Zacatecas. Currently, 74% of their range is found in Nuevo Leon, 24% in Coahuila, and only 2% in San Luis Potosi. Their distribution is limited to the north and west by the Sierra Madre Oriental, and to the south and east by semi-arid hills and grasslands. They have not been introduced anywhere else in the world. HABITATThe Mexican prairie dog is found at elevations between 1600 and 2200 meters. The species is restricted to 6 large, arid grassland valleys and intermontane basins in Mexico, specifically the Mexican Plateau. These grasslands are found at the base of larger valleys and basins, and form one phase of a semi-arid shrub mosaic. They are strongly associated with outcrops of gypsum soils, which are of low productivity. The gypsum rock found in these soils originate from eroded marine sediments deposited during the Pleistocene. The habitat is commonly surrounded by arid scrub and contains short grasses typical of calcareous and gypsophyllum soils such as creeping muhly (Muhlenbergia repens) and burrograss (Scleropogon brevifolius). Mexican prairie dogs excavate exploratory burrows in rocky, sandy, and clay soils; however, very sandy soils are unfavorable for burrowing. They may be able to colonize or re-colonize former croplands if the soil composition provides good structural support and depth for burrowing. Prairie dogs of all species avoid steeply sloped areas due to decreased predator detection in these habitats. In addition, sloped environments are often very rocky and thus provide poor habitat for fossorial animals.ECOSYSTEM ROLESThe Mexican prairie dog is considered a keystone species in the Mexican Plateau, helping to support an ecosystem full of predators, prey, insects, and plants. They have a significant impact on soil composition, excavating large burrow systems and creating strong bottom-up effects. Burrowing leads to aeration of the soil, cycling of nutrients, and changing the soil texture. By eating only certain plants and grazing, they play an active role in altering the diversity and abundance of local plant communities.CONSERVATION STATUSHumans have played a significant role in the decline of Cynomys mexicanus. Recreational shooting, modification of land for agricultural purposes, soil erosion by cattle herding, and eradication programs have all contributed to their declining numbers. Habitat destruction has caused resources to become limited, and the continued loss of grassland habitat prevents the recovery of the species. Habitat fragmentation and a small geographic range have resulted in Cynomys mexicanus being listed as endangered by the IUCN (International Union for Conservation of Nature and Natural Resources). Over the past four decades, 62% of C. mexicanus habitat has been lost due to human impact. Population densities are lower in the southern extremities of their geographic range, which likely results in higher extinction rates in these areas. Transplantation of individuals from northern areas has been suggested to help with conservation, as natural recolonization alone will not reverse their endangered status. Cynomys mexicanus is fully protected by Mexican law, although it is only in Racho Los Angeles, Coahuila where any substantial protection is enforced.”SCIENTIFIC CLASSIFICATIONKingdom: AnimaliaPhylum: ChordataClass: MammaliaOrder: RodentiaFamily: SciuridaeGenus: CynomysSpecies: C. mexicanusBinomial name Cynomys mexicanus EXCEPTIONAL APPEARANCE Please review scan for condition as it will be considered part of description ELUSIVE ITEM FOR THE SPECIALIST Very-Fine Condition. Covers and Stamps Are Guaranteed. You only pay the postage once. Take advantage to combine your purchases.SHIPPING COSTSWORLDWIDE:FREE BY REGISTERED MAIL

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