The Questioner: What is the ruling on bird droppings, whether it is from a bird that is eaten or not, if it is found on the place of prayer or on a person’s body?
Shaykh Muqbil: What is apparent is that if the bird is not from what is eaten, then it is impure (نجس – najis), and if it is from what is eaten, then there is no harm in that. And Allah knows best.
Ghārat al-Ashriṭah, vol. 1, p. 146