bird poo

[johnnyedge]

Not my question but my 4 year old grand daughters, when a bird poo landed on the cover of her sand pit I had to quickly stop her from touching it and explained what it was, she then asked why is it white if its poo, I replied it just is, but why is it she asked? I had to admit I dont realy have a clue, can any one answer this, I am guessing it down to diet.
Thanks.

[Teddio]

The white is mainly uric acid. As the water from the poo evaporates it comes out of solution.

[Ethel]

Bird droppings are both poo and wee - they come out of the same opening, called the vent.

The urine sometimes takes the colour out of the faeces, but very often you can see the two distinct parts - the faeces coloured and the urine white.

How to explain that to a four year old? That's what grandparents do best. :)

[johnnyedge]

Thanks both for your input, I guess my answer to my grand daughter will remain "it just is", how long this will hold out for I dont know though,
johnny edge.