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 aslions, leopards, Iynxes and wolves, were counted as"wild dogs."However, someone who was in ihram should not kill beasts of prey thatdid not attack (people), such as hyenas, foxes, cats and anything elselike them, and if he did then he had to pay a forfeit for it.Similarly, someone in ihram should not kill any predatory birds exceptthe kinds that the Prophet, may Allah bless him and grant him peace,specified, namely crows and kites. If someone in ihram killed anyother kind of bird he had to pay a forfeit for it.
USC-MSA web (English) reference: Book 20, Hadith 92
Arabic reference: Book 20, Hadith 794