The weight in the birdhouse reached a maximum two days ago so I got my camera and went to check on the little birds. The dad was sitting in the tree chirping really loud. I think he was trying to get the young ones to leave the nest. And the mom was still bringing in food and carrying out waste. I'm kind of puzzled by the 300 gram maximum weight. An adult bird weighs between 15 and 20 g. If I subtract about 50 g for the nest there is about 250 g that need to be accounted for. Even if a fledgling weighs about 15 g that makes for a lot of birds (maybe there are feces left in the birdhouse adding to the weight).