Sahih Bukhari Volume 4, Book 54, Number 529:
Narrated Abu Mulaika:
Ibn Umar used to kill snakes, but afterwards he forbade their killing and said, "Once the Prophet pulled down a wall and saw a cast-off skin of a snake in it. He said, 'Look for the snake. 'They found it and the Prophet said, "Kill it." For this reason I used to kill snakes. Later on I met Abu Lubaba who told me the Prophet said, 'Do not kill snakes except the short-tailed or mutilated-tailed snake with two white lines on its back, for it causes abortion and makes one blind. So kill it.' "
Volume 4, Book 54, Number 530:
Narrated Nafi:
Ibn 'Umar used to kill snakes but when Abu Lubaba informed him that the Prophet had forbidden the killing of snakes living in houses, he gave up killing them.
Volume 4, Book 54, Number 531:
Narrated 'Aisha:
The Prophet said, "Five kinds of animals are mischief-doers and can be killed even in the Sanctuary: They are the rat the scorpion, the kite, the crow and the rabid dog."
Volume 4, Book 54, Number 532:
Narrated 'Abdullah bin 'Umar:
Allah's Apostle said, "It is not sinful of a person in the state of Ihram to kill any of these five animals: The scorpion, the rat, the rabid dog, the crow and the kite."