E: Mustelid's whiskers let them know how wide a hole is in relation to their body.
https://www.nationalgeographic.com/photography/photo-of-the-day/2015/2/ermine-gran-paradiso-unterthiner/
E: Mustelid's whiskers let them know how wide a hole is in relation to their body.
https://www.nationalgeographic.com/photography/photo-of-the-day/2015/2/ermine-gran-paradiso-unterthiner/
E: Mustelid's whiskers let them know how wide a hole is in relation to their body.