After a "trial period" of three days the result is sobering: The Blackbirds drive still making trouble and not in front of the Bird Chaser, but behind it they raise now the bark and to distribute it as before. Deterrence? Effect? For nearly 40, - a total failure. Only we are annoyed by the raptor imitations as "Plumbers". While the scarecrow responds, but. To us and less on the birds Sitting in front after we in our Thujahecke and wait until the clamor has laid again after about 60 seconds.
No RECOMMENDATION !! The money you can save quiet ....