Go tell the bees....
UK: Royal bees informed of Elizabeth II's death
The bees that inhabit the gardens of Buckingham Palace and Clarence House were informed on Friday by the Royal Palace's official beekeeper of the death of Queen Elizabeth II, in accordance with an ancient custom.

A black ribbon
Wrapping a black ribbon around the homes of the tens of thousands of bees that populate the royal gardens at this time, John Chapple wanted to reassure the bees. "You knock on every hive and say, 'The mistress is dead, but don't go in. Your master will be a good master for you." He then enjoined the bees to be good to their new master, Charles III, himself known for his love of plants.
Keeping the bees informed of important events in the life of their guardian is a traditional custom in many European countries, practised mainly in England. The royal hives, two at Clarence House and five at Buckingham Palace, can house up to a million bees at the peak of summer. But at this time, their population decreases and the hives are on average populated by only 20,000 workers, who will also have to mourn the one who has been their longest-serving regent and, by extension, their longest-serving mistress.
See also on the subject
https://www.youtube.com/watch?v=jk9wbY9XkwM