Sahih Muslim
The Book of Pilgrimage (Kitab Al-Hajj)
Book Number: 007 / Hadith Number: 2731
'Abdullah b. Umar (Allah be pleased with them) reported Allah's Messen- ger (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.