“Once abu ‘Abd Allah (a.s.), was asked about the leftover of the water from which pigeons have drunk. He (the Imam) said, ‘It is permissible for you to use the leftover from which edible animals have used. You can use it for Wudu’ or drink the leftover of the water from which they have drunk, like a falcon or a hawk or an eagle.’ He (the Imam) then said, ‘You can use for Wudu’ the water from which birds have drunk, unless you see blood on their beaks. If so then do not use it for Wudu’ or drinking.’”