Yes, the birdhouse is selfmade.
I will soon rework it a little, the feed becomes too wet, if it is raining.
Right, Number 2 is a 'Heckenbraunelle'
'Dunnock' in English.
Number 3 are juvenile blackbirds, as Birdfriend
said. After leaving the nest, they were running around on my terrace every day for about 2 or 3 weeks.
Crested and long-tailed tits have not been here so far.
There are 3 cats here in the neighborhood. I always scare them off, but they don't care about it. The next day they cross over my terrace as if nothing has happened...