Quis custodiet ipsos custodes?

.....can be translated as ‘Who watches the watchers?’
I went to the local Wildlife Reserve with Mrs B to take images of the wildlife, and couldn’t resist this one of a pair of Twitchers!
I did manage images of Swans and their juveniles, Grebes, Mallards, Canada Geese, Tufted Ducks and various noisy Gulls.