" خَمْسٌ مِنَ الدَّوَابِّ لاَ حَرَجَ عَلَى مَنْ قَتَلَهُنَّ الْعَقْرَبُ وَالْغُرَابُ وَالْحِدَأَةُ وَالْفَأْرَةُ وَالْكَلْبُ الْعَقُورُ "
It was narrated that Ibn Umar said: "Hafsha the wife of the Prophet said: 'The Messenger of Allah said: Thee are five animals for which there is no sin on the one who kill them: Scorpions, crows, kites, mice and vicious dogs.'"