Hawk

are commonly used for communication between villages. Takamaru and Tobimaru both belong to Sunagakure, with the former being the village's fastest messenger hawk. Sasuke Uchiha is also able to summon his own large hawk, which he can use for flight. Sasuke used his hawk to deflect Danzō's wind technique. The way he acquired the contract to summon hawks is unknown, something Tobi commented on.