Arborist

Arborist is a mob that loves wheat. If you feed it, you can get sweet birch juice, which will be quite useful in long-distance travel. 

Birch juice is a sweet juice (extracted from birch, but it's not interesting) that has an interesting feature that resembles milk, but there is a way to make a birch drink even better.

Syrup is an improved version of birch sap. It is cooked in a cauldron with the addition of sugar to birch juice. The syrup is used to create sweet syrup cakes.

To extract birch sap, it is necessary to feed the arborist with wheat (an empty bucket must be held in the main hand).