Sahih Muslim Book 7, Hadith Number 2729.

Chapter : Which animal the Muhrim and the non-Muhrim are permitted to kill in the state of Ihram at the conclusion of it (within the precincts of the Ka’ba).

Ibn Juraij reported: I said to Nafi: What is that which you heard Ibn ,Umar declaring permissible for a Mubrim to kill some of the beasts? Nafi, said to me that ‘Abdullah had reported: I heard Allah’s Messenger (may peace be upon him) as saying: Five are the beasts in killing which or their being killed, there is no sin: crow, kite, scorpion, rat and voracious dog.