Most swifts won’t use birdhouses. They prefer large structures with hollow cavities, partly due to the increased shelter and partly due to the decrease in competition from other bird species.
The Royal Society for the Protection of Birds (RSPB) designs, distributes plans for DIY, and sells a nesting box specifically for swifts, and instructions for where to place them on homes.
Most swifts won’t use birdhouses. They prefer large structures with hollow cavities, partly due to the increased shelter and partly due to the decrease in competition from other bird species.
The Royal Society for the Protection of Birds (RSPB) designs, distributes plans for DIY, and sells a nesting box specifically for swifts, and instructions for where to place them on homes.
To note however, the RSPB were one of the main campaigners for swift bricks.
https://www.rspb.org.uk/whats-happening/news/scotland-becomes-first-uk-country-to-put-swift-bricks-into-law
They still need making and putting up, and they’re more obtrusive than a swift brick as they stick out instead of being embedded in the wall itself.
Huh, fascinating! I’ve never seen these before!