Nothing new to report today. Our box 3 pair returned to roost last night, as did the single parent of the two swiftlets in box 2. One thing we've noticed is that the pair in box 3 are not so 'cuddly' as the box 2 pair were, they tend to sleep alongside each other but there's no preening going on or snuggling up, and they're both very still all the time. Maybe they realise there's no point at the moment!
Our swiftlets in box 2 are doing well and are starting to look like proper 'teenagers' now.