Ponds - anything counts!

I have a "proper" wildlife pond, but also have several old washing-up bowls which I've sunk into the ground with stones in for entry/exit, and I know these are appreciated because once I re-adjusted one bowl to get it level ... and up popped a frog to see what was disturbing his peace - I don't know who was most surprised! But to top it all this Summer an empty plantpot (without drainage hole) that had filled with water, was sitting amongst other plantpots that I was watering and I suddenly became aware that something was watching me from the water-filled pot ... yes, a frog! He stayed there for several weeks and always enjoyed his daily shower from the watering can! Motto: a "pond" is never too small ... something will appreciate it!