[Seany (OP)]

Why is bird poo sometimes white and sometimes black?

[daveshorts]

normally it is white with a black lump in it. The black lump is analagous to our poo, and the white analagous to our urine. Birds do not urinate because carrying around all that water would be very inefficient if you have to fly. So instead of making our main waste product in urine - urea, which is very soluble, they make uric acid which is quite insoluble, which they deposit with their poo. This wastes much less water and makes them lighter.

[Seany (OP)]

Oh.. Yes I do see the black lump and white around it.. So their urine is wrapped around their poo?

[Karen W.]

Interesting.. what about when they poop all over you in flocks and they all drop at once and it is purple .. Is that because they all feasted in a berry patch? Then took flight at the same time, and also have the same digestive timing which allows them to bombard you while you are wearing a beautiful white dress?? WELLLLL??? What about their digestive system when they all let loose at once as a flock over your head? I kid you not this has happened to me on three separate occasion's. On the fourth occasion I saw the shadow of the flock looked up to hear small droppings like heavy rain and saw the birds coming thus on this occasion causing me to run for cover of the nearest porch! LOL They missed me on round 4!! LOL I have become wiser! lOL