stoat

/stoʊt/
noun
  1. A small, agile carnivorous mammal of the weasel family, with a long body and short legs; in northern regions its fur turns white in winter (then called ermine).
    • In winter, the stoat's coat changes to white to help it hide in the snow.
    • A stoat darted across the path and disappeared into the underbrush.
    • The farmer spotted a stoat near the chicken coop and shooed it away.
Synonyms