Bonnie in NJ wrote:
We thought the fishing line sounded good too - then we watched the heron
tip toe over and thru the fishing line. We then moved on to netting the pond.
That worked, although the heron was able to stab a fish thru the net but couldn't
extract it. The fish did survive but does carry a scar.
Now we rely on the motion detector and haven't seen a heron since it
was installed.

I bet you're happier dealing with the sprinkler than the net
anyway. ;-) ~ jan
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Zone 7a, SE Washington State
Ponds: www.jjspond.us