The stoat (Mustela erminea), also known as the ermine or short-tailed weasel, is a species of Mustelidae native to Eurasia and North America, distinguished from the least weasel by its larger size and longer tail with a prominent black tip. In New Zealand, it is held responsible for declines in native bird populations. It is nominated among the 100 "world's worst invasive species".
American Pine Marten are experts at playing hide-and-seek in the Rain Forest. They are an all season hunter. They move effortlessly, so they are so quick, they are "here one second, and gone the next".