A skulk, a leash, and an earth are the main collective nouns for Foxes. A skulk is a group of foxes, a leash is a group of three foxes, and an earth is a den or burrow of foxes. Other collective nouns for Foxes include a lead and a troop.
When you see exactly three foxes together, the right word is a leash. That name traces back to the Old English word lēase.
Skulk, the most familiar of these words, comes from the Old Norse skulka, meaning to hide or lurk. It paints the picture of foxes slipping quietly through the shadows together.
