Hey thanks for the comments. This was a definite help in identifying the differences between the sharp shinned and the coopers as the sharpie is defintely a smaller bird compared to the coopers i got pics of recently. The cooper also seemed to have a more greyish blue wing feathers and heavier horizontal barring on the chest wheras this sharpie has brown wings and a more whiter breast. I guess the sex and age can have an effect on how difficult it is to identify the two birds from each other.
He did look pretty hungry. Is it bad that deep deep down i was kinda hoping he would have got some dinner so i could have got some really really good pics.