"There is no person who kills a small bird or anything larger, for no just reason, but Allah will ask him about it." It was said: "O Messenger of Allah, what does 'just reason mean?" He said: "That you slaughters it and eat it, and o not cut off its head and throw it aside," (Using translation from Nasāʾī 4445)   

قَالَ رَسُولُ اللَّهِ ﷺ «مَنْ قَتَلَ عُصْفُورًا بِغَيْرِ حَقِّهِ سَأَلَهُ اللَّهُ عَنْهُ يَوْمَ الْقِيَامَةِ» قِيلَ وَمَا حَقُّهُ؟ قَالَ «أَنْ تَذْبَحَهُ فَتَأْكُلَهُ»