Fox jump?
The reason I ask is our garden has a 6ft fence all around it with nothing to climb on.
And swmbo has found some black poo about the size of a fifty pence coin on a leaf.
And all I can figure is that a fox left it as it does not look like cat poo.

Flying Fox?

Hedgehog poo?

what does hedgehog poo look like ?

Flying fox…..did I forget to mention that I am in Somerset and not South America ?

http://www.nature-diary.co.uk/nn-images/0407/040710-hedgehog-dropping.jpg

Now this is a log where as ours is curly and black

There's no scale on that pic, 50p piece-sized sounds right for hedgehog, assuming the one that visits our garden is typical.