Scarecrows help the players to keep the crows or other birds away from the fields. Go through this guide and follow step-by-step instructions to make a small Scarecrow.
The first thing you need to do is to place an armor stand on the ground and add a leather tunic on it.
After this add a curved pumpkin at the top of the armor stand. Place two spruce fence pieces at the top of the pumpkin and push them down by using two pistons with redstone block.