A bird decoy, such as the kind used for hunting, includes a body and head representative of the type of bird (e.g., goose, duck, turkey, etc.) being decoyed. The head is removably attached to a body. A wind rotation mechanism is inserted into the ground to support the decoy. The wind rotation mechanism can be attached to the head of the decoy and can include a shaft rotatably inserted into a tube. A tether can connect the decoy to a stake in the ground to constrain movement of the decoy. A set of such decoys includes a plurality of decoy bodies nested together in a stack.