the Prophet was asked what the Muhrim may kill. He said: "He may kill scorpions the evil creature (mice), Kites, crows and vicious dogs." (Using translation from Nasāʾī 2834)  

أَنَّ النَّبِيَّ ﷺ سُئِلَ مَا يَقْتُلُ الْمُحْرِمُ مِنَ الدَّوَابِّ؟ قَالَ «يَقْتُلُ الْعَقْرَبَ وَالْفُوَيْسِقَةَ وَالْحِدَأَةَ وَالْغُرَابَ وَالْكَلْبَ الْعَقُورَ»  

"The Prophet said: 'There are five kinds of animals for which there is no sin on the one who kills them, whether he is in Ihram or not: Mice, kites, crows, scorpions and vicious dogs.'" (Sahih) Chpater 89. What The Muhrim May Not Kill (Using translation from Nasāʾī 2835)  

قَالَ النَّبِيُّ ﷺ خَمْسٌ مِنَ الدَّوَابِّ لَا جُنَاحَ فِي قَتْلِهِنَّ عَلَى مَنْ قَتَلَهُنَّ فِي الْحَرَمِ وَالْإِحْرَامِ الْفَأْرَةُ وَالْحِدَأَةُ وَالْغُرَابُ وَالْعَقْرَبُ وَالْكَلْبُ الْعَقُورُ