Bird Acrobatics

Birds are amazing, so many varieties ,it's hard not to take picture's of them doing unusual things. The other day while walking home I spot some Blue Tits on a tree , nothing unusual with that you say . But what I saw amazed me ,the tree was budding up and must of had sweet sap or something, because the birds were hanging upside down pecking at the buds . With my trusty Nikon D7000 in hand ,I set it to Aperture Priority , F5.6 , Shutter 1/200 , ISO 100 ,