It makes you wonder just how many other animals out there have had their intelligence underestimated?
You saying about Tits (Crude minds exit thread that way please) reminds me of the phenomenon which arose in the UK after the First World War when dairies began to put aluminium foil over their glass milk bottle lids which were delivered to peoples doorsteps by the milkman early in the morning. Well, over time certain Blue Tits discovered that they could peck through the lid and get at the cream underneath and by the 1950s virtually every Blue Tit in Britain knew the trick. Nowadays though the milk delivery run is a thing of the past (alas) and so are the foil topped milk bottles, so it's pretty unheard of now.
http://www.independent.co.uk/environ...es-578134.html