Who has a white tip in their droppings rat or lizard?

Lizards typically have white tips in their droppings, which are composed of uric acid, a waste product that is excreted instead of urea, as reptiles do not produce liquid urine. In contrast, rat droppings are generally dark brown or black and do not have a white tip. Therefore, if you observe droppings with a white tip, they are likely from a lizard.