Sahih Muslim Book 7, Hadith Number 2731.

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).

‘Abdullah b. Umar (Allah be pleased with them) reported Allah’s Messenger (may peace be upon him) as saying: Five (are the animals) which, it one kills them In the state of Ihram, entail no sin for one (who does it): scorpion, rat, voracious dog, crow and kite.