Sayyiduna Ibn Umar (may Allah be pleased with them both) said: The Messenger of Allah (peace and blessings be upon him) "ordered the killing of the wolf, the mouse and the kite." It was said to him: And the snake and the scorpion? He said: That too used to be said. Yazid bin Harun said: Meaning the person in ihram (may kill them).
Al-Hajjaj bin Artat is not used as evidence; and we have narrated it from the hadith of Ibn al-Musayyib as a good mursal report.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 10042