Check out the past posts about "scarecrows". Some of us have these
motion-detector sprinklers to keep the heron away. It's a neat little
device, and might be worth trying if you're hesitant to net the pond.
Sue

I agree, I'm using mine for robins, has to be turned all the way up, but
the groundcover is staying in the blocks where I planted it. ~ jan

See my ponds and filter design:
http://users.owt.com/jjspond/

~Keep 'em Wet!~
Tri-Cities WA Zone 7a
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