As I walked a smaller than full adult human sized brown shape appeared
and asked if it could walk beside me. I said 'yes'. Within a split
second of thinking 'yes', it disappeared and a duck quacked loudly a
few times from the pond. It took me a few seconds to see one lone
female mallard sitting on the water all alone.
Perhaps it was playing a game with passing humans and was startled by
me never expecting anyone would answer it.
ben