Humans and most of the animals all make brown poop, but as you all have noticed that birds produce white or black poop. Have you ever thought why? What makes birds change from the standard color palette and produce black and white poop?
The interesting thing is, white stuff in bird poop is not their poop, it’s their pee. The brown or green thing in the middle is their poop. They excrete both together.
Unlike us, birds do not do it separately, they pee and poop together. Birds digestive system doesn’t work exactly like ours or most other animals. Their kidneys extract nitrogenous waste from the bloodstream, but instead of releasing it as urea in urine, they release it as uric acid.
It is white because of the biochemical reactions it goes through in the bird’s body so minimal water is lost when they excrete. The black, green, or brown thing that is solid in the center is actually their poop.
Also, Birds do not have different openings for different purposes. Most bird species don’t have “traditional” penises and vaginas.
They have only one opening called the “cloaca” – an all-purpose entrance and exit for the intestinal, reproductive, and urinary tracts. It’s used to expel waste, lay eggs and have sex.
The poop and the white pee are excreted from different body systems but do not have enough time to blend.
This orificial multitasking explains the brown or green thing in the middle often in the center of the white acid waste. That’s the actual “poop” or stool. Because the acid and poop are expelled at the same time from the same opening but from two different bodily systems.
The poop and the white pee are excreted from different body systems but do not have enough time to blend, and you get a bird poop that’s white or black in color.