Hadith 8:3101
Abu Bakr narrated to us, he said: Abu al-Ahwas narrated to us, from Zayd ibn Jubayr, he said: I asked Ibn Umar, "What may the *muhrim* (pilgrim in state of ihram) kill?" He said: "One of the wives of the Messenger of Allah (peace be upon him) narrated to me that he ordered the killing of the crow."
حدثنا أبو بكر قال نا أبو الأحوص عن زيد بن جبير قال سألت بن عمر ما يقتل المحرم فقال حدثتني إحدى نسوة رسول الله صلى الله عليه وسلم أنه أمر بقتل الغراب