Great Tit with Grub. lol

This shot was a real test of equipment?
It was shot @ full frame on the D800 ie 7360 x 4912 and then cropped @ 2657 x 1773 @ ISO 2500,1/250 Sec. @ F8? There is a fair amount of grain but the shot was 'Obtained'! I don't think this would have been possible a few years ago,even with digital.And I think impossible with film?
Someone with better Photoshop skills than I would probably make a better job than I have?