@alex240101,
I had a pond-in-a-pot back in Venice, that is, an almost three foot round and tall, somewhat fancy, concrete pot with stones, water, water hyacinths, mosquito fish, and gold fish, with a simple fountain jet. I looked out the kitchen window one day to see a great blue heron perched on the rim... instead of chasing him or her away, I got a great photo.. (but where is it now?)