Why birds don't pee?

birds do not "pee" in the way humans do. They don't have a bladder to store urine and instead excrete uric acid, which is a semi-solid waste product, along with feces through a cloaca.

This combination is often seen as the white or pale yellow part of bird droppings.

Birds don't have a urinary bladder to store liquid urine.

They produce uric acid, a less toxic waste product that helps conserve water, instead of urea like humans.

All waste, including both feces and uric acid, is excreted through the cloaca, a single opening for mating, laying eggs, and eliminating waste.

The white or pale yellow part of bird droppings is a mix of the solid uric acid and feces.