The Mystery of the Missing Brick…….

……yep, it's a real cliffhanger! 

A house a couple of doors down the street from me has a missing brick under their first floor bay window that seems to have become a popular hang-out (literally!) for the local spuggies……whatever the hole has been plugged with seems to be very 'peck worthy' (see extra). There's only room to seat a couple of customers at a time, but there's usually an orderly queue perched on the windowsill above. Any thoughts bird buffs?