Hi...I have been watching a single bluetit coming into the bird box since April....there was a lot of activity, then he disappeared...I was happy to see him back and named him Casanova....he brings insects to the box....I have only ever seen him once feed the female who was sitting on the perch, but not since, and it is now June.....what is happening? I'm beginning to think it's just his holiday home....I'm only seeing him?