Bee Nest

 is a wildlife item that can spawn on any type of tree anywhere on the map. Bees live inside it, and can be seen flying around it. If you add a bee nest to a Skep or Beehive, it's possible to get honey.

There will always be 4 on the map at any time (2 for a small map), but this count includes nests on the ground, so new nests will not spawn in until an existing nest is placed into a structure. If the player has a dense tree farm with lots of items on the ground, it may be helpful to program a bot to search for any nests hidden under other objects within that area.