The housing shortage in Munich is big enough to start a fight over a nesting box. So a bumblebee decided that the finished nesting site would be a nice home for itself and I observed the insect.

In order to free the tit family from these rent nomads, I opened the nesting box and chased the bumblebee away. Unfortunately, this didn't last long and the troublemaker quickly returned. The tit then took the problem into its own hands.