Sahih Muslim Book 7, Hadith Number 2727.

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).

Zaid b. Jubair reported: A person asked Ibn ‘Umar which beast a Mubrim could kill, whereupon he said: One of the wives of Allah’s Apostle (may peace be upon him) told me: He (the Holy Prophet) commanded to kill voracious dog, rat, scorpion, kite, crow, and snake (and this is allowed) likewise in prayer.