Been receiving a number of emails and SMS on how to prevent Owl from entering BHs.
You need to look at various options.
The best is to employ a license gun keeper to shoot those predators. But this might not be good enough after he goes home for his lunch or rest.
The other option is to use a grilled entrance hole. The grill must have opening of not smaller then 10 inches in length by 8 inches wide. The birds can fly in easily during their flight home but those owls will not be able to.
What about installing a sliding door with grill like the above picture taken while I was in Sedili?
Looks need and simple. The owner installed a timer to shut the entrance hole at about 7:30 pm till 7.00am in the morning.
Of course you might want to combine all the above with those electrical fencing and sharp nails on the latch or entrance areas.
Most important is to ensure that those owls will not be inside your BH.
The moment they stay inside your birds population will drop drastically. Almost 60% will be gone within a few short weeks.
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