31 days post cutout of a strong feral colony where I accidently killed the queen I saw a slim black queen wandering around on the front of the hive and then going back inside. I presume this is a queen the colony has raised and she was doing her orientation. Do queen bees change colour? Does a black queen mean that they might become more aggressive?
Never really noticed a connection between colour and agression.
The only traits that seem to be tied to dark colored bees are frugalness and good overwintering. Dark bees or “yellow” bees can both be quite gentle or quite ferocious…