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Be patient, but look for signs of recent predator activity. I stumbled on a flock while hiking in the Olympics off of Hamma Hamma about 10 years ago, but wdfw stopped putting pressure on the cats and they took over.
The bad thing about Westside birds is they just don't gobble like the east side birds. I quite honestly think it's because of the predator pressure they get. The one flock I know of hasn't moved much more that a mile from where they were planted. But they rarely if ever make any noise.