Our ponds support a LOT of wildlife other than just our fish!
During out recent drought, I deepened one of my groundwater ponds to get it back below the water table.
At one point, it was the only open water for miles around. I had lots of tracks in the moist clay at the shoreline, but it even supported birds and insects that I would observe when I walked in quietly.
I wish I had left a game camera up on time lapse just to get a view of every organism that utilized the pond!