If you look very carefully, you will spot the frog

Frog-tastic

There were two large plastic buckets full of water almost hidden under the ivy near my backdoor - covered in duckweed, as duckweed seems to spread of its own volition - and undoubtedly mosquito sinks.  It was only when I emptied them that I realised they had frogs in - so I had to reinstate both the full buckets of water AND the duckweed and worry about what I had done to remove the ivy.  The frogs, it seems, climb up the ivy branches to get to the water.  Now if i could be sure the frogs would eat all the mosquitos as they hatch, we would all be fine.

Frog lurking on edge of bucket having climbed ivy stem to get there