The harefolk has advantage on Wisdom (Perception) checks that rely on smell.

The harefolk can’t be surprised, and it has advantage on initiative rolls if it isn’t incapacitated or unconscious.

The harefolk has advantage on Intelligence (Investigation) and Wisdom (Insight) checks to determine if a creature is a shapechanger. It automatically succeeds when the shapechanger is a werewolf. In addition, the harefolk has advantage on its first attack roll each turn against a creature with the Shapechanger trait or Change Shape action, regardless of whether the harefolk was previously aware of the shapechanger’s nature.

The harefolk has advantage on Dexterity (Stealth) checks made to hide in snowy terrain.

The harefolk can move across icy surfaces without needing to make an ability check. Additionally, difficult terrain composed of ice or snow doesn’t cost it extra movement.