Maliks Muwatta Book 20, Hadith Number 92.
Yahya related to me from Malik from Ibn Shihab that Umar ibn al-Khattab told people to kill snakes in the Haram.
Malik said, about the “wild dogs” which people were told to kill in the Haram, that any animals that wounded, attacked, or terrorised men, such as lions, leopards, lynxes and wolves, were counted as “wild dogs.” However, someone who was in ihram should not kill beasts of prey that did not attack (people), such as hyenas, foxes, cats and anything else like them, and if he did then he had to pay a forfeit for it. Similarly, someone in ihram should not kill any predatory birds except the kinds that the Prophet, may Allah bless him and grant him peace, specified, namely crows and kites. If someone in ihram killed any other kind of bird he had to pay a forfeit for it.