Ravens
Not really a new "dig".
A group[a] of at least six captive ravens are resident at the Tower of London.[3] Their presence is traditionally believed to protect The Crown and the Tower; a superstition holds that "if the Tower of London ravens are lost or fly away, the Crown will fall and Britain with it."[3] Some historians, including the Tower's official historian, believe the "Tower's raven mythology is likely to be a Victorian flight of fantasy".[4] The earliest known reference to captive ravens at the Tower is an illustration from 1883.[5]
It was said that at the execution of Anne Boleyn in 1536, "Even the ravens of the Tower sat silent and immovable on the battlements and gazed eerily at the strange scene. A Queen about to die!"[9] The ravens of the Tower behaved much worse during the execution of Lady Jane Grey in 1554, purportedly "pecking the eyes from the severed head" of the queen.[10]
https://en.m.wikipedia.org/wiki/Ravens_of_the_Tower_of_London