Kalmar "New World Least Weasel" tana nufin wani nau'in weasel mai suna Mustela nivalis, wanda ke samuwa a Arewacin Amirka da Tsakiyar Amirka. Kalmar “Sabuwar Duniya” tana nufin gaskiyar cewa ana samun wannan nau’in a cikin nahiyar Amurka, wanda Turawa ke kiransa da “Sabuwar Duniya” bayan an gano su a ƙarni na 15 da 16. Kalmar "Least Weasel" tana nufin ƙananan girman wannan nau'in dangane da sauran weasels.