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Bluebird Houses - Successful House Sparrow Prevention!
(midwest.social)
A community for people who like birds, birdwatching and birding in general!
Feel free to share your photos and other birding-related content here. If a photo you post isn't yours, please credit the original creator! Additionally, it would be appreciated if the location of the sighting and a date were given when a photo or question is posted. You do not have to give the precise location, something like "Northern Idaho, June 2023" or even "North-Western US, June 2023" suffices.
How exactly does that work to deter sparrows?
I know a similar method is used to keep birds from grabbing fish in a Koi pond. Something about the filament deters them. The sparrows often land on top of the box first so I wonder if this has the same effect of stopping them from dropping into the filament.