Mammuthus exilis (pygmy mammoth or Channel Islands mammoth) is an extinct species of dwarf elephant that evolved from elephants, Mammuthus exilis. Considered as an example of island dwarfism, in a 2010 study on this species, the average height of the shoulder was 1.72 m. and its weight is 760 kg. It has been revealed to be around. M. columbi, which he descended from, was 4.3 meters long and weighed 9100 kg.