Danny you remind me:
As the Shack slowly waddled down the taxy way the Captain, John Elias, asked of no one in particular if we knew the difference between Crows and Rooks - pause - Crows are solitary birds and Rooks are in a group.
At this point a solitary Crow flew from one side to the other where there was already a number of birds.
"Captain - Lookout, that Crow has just become a Rook"