I believe ospreys, like all birds of prey, e.g. "raptors," are completely
protected in the U.S. and Canada.
I didn't read the previous about "porcupines," but do think something with
"inconvenient" (to the osprey) pointy things, to make it difficult or
impossible for the osprey to find a comfortable perch on your antennas, will
almost certainly work to make him go find somewhere else that's more
I know there are specialists who try to get rid of pigeons, etc. on downtown
office buildings and one of the things they also use is high-pitched sound
emitting things. I'll bet something like that might work. It'd be interesting
to find an osprey biologist -- and I'll bet there are some and they could be
relatively readily found by Googling -- and ask some of these questions. It
could even have the makings of a doctoral thesis and you could get some grad
student to come out and implement it, document the results, and write it up!
73 - Rich, KE3Q
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