( side entrance is always disadvantage)
The above Bh belongs to a reader of mine from Thailand. He changed the Entrance hole to the front with bigger size and lower the entrance hole tweeters to the bottom and swiftlets start to enter Bh.
Before the changes not many Swiftlets want to fly in. I have written about the importance of the tweeters at the entrance hole. It should be installed at the right place if you want birds to flying fast.
Look at the top picture many birds are flying in. So if you know what to do and how to change things the result will be astonishing.
Good swiftlet farming all!
swifjames@yahoo.com 012-3173811.,