I am sure water attracts not only bird, but actually a full ecosystem ranging from the smallest organisms to much larger ones like birds. I however agree that the most interesting ones to observe are the birds (at least from my own subjective opinion). Thanks for sharing your pictures. I enjoyed them from the first to the last.
As a side note, the last point you raised should make us thinking. Climate change and ecological considerations impact all of this (i.e. nature in general). We are currently loosing already a lot, and our children won't be able to enjoy many things we do…