I would guess that pretty much every pond will have either or both.
They are part of the food chain of the larger predators.
One other thing to consider is access to the ponds.
One of my preferences when I took my neices and nephews fishing the first few times was to find a section of shoreline with plenty of casting room and clear water so that the kids could actually see the fish eating their bait. Trust me, it will definitely peak his interest when he can see the fishies!
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