Minecraft wiki entry for Birch, associated text: Bee Nest (if present on a tree near flowers)
Birch Leaves (harvested with shears)
Birch Log (harvested with any tool including hands)
Birch Planks (created from a log in the inventory crafting grid)
Birch Sapling (normal birch only; chance of dropping when breaking leaves)
Mushrooms‌[Bedrock Edition only] (if present on a fallen log)
Stripped Birch Log (created by using an axe on a log)
Stick (chance of dropping when breaking leaves)