Minecraft wiki entry for Fox, associated text: Although a fox appears to hold an item in its mouth, it is technically holding the item in its main hand, therefore anything held affects it, such as a sword increasing its damage or a totem of undying resurrecting it.
In the real world, some species of fox jump high to catch their prey by surprise, an action reflected in their Minecraft counterpart.
Foxes do not pick up items when gamerule mobGriefing is set to false.
When foxes were being added into Minecraft, a glitch occurred where they looked like boxes.[3]
Baby foxes are small enough that when they are swimming, they take drowning damage. This is noticeable when they attempt to attack fish.
There is a splash screen "In case it isn't obvious, foxes aren't players" in the game, which was added from the description of the bug MC-166292.
The first and third screeching sounds foxes make are the same. The first sound is the third in reverse, but higher-pitched, and the third is the first in reverse, but lower-pitched.
Fox sounds are actually combined and heavily edited cat and dog sounds.[4]