Today's bird - nuthatch

For reasons I won't go into, this was photographed at nearly 4:00pm (getting dark), ISO 1600, 1/80th second, and the equivalent of an 810mm (35mm FF) lens at full aperture, on a camera with a 1 inch sensor, on a dull and slightly misty day, and this is a crop of about 1/6 of the original image, so it is not surprising that the IQ leaves something to be desired! It was also a 'snatch' shot - I had only just got the camera and tripod into position, with existing settings, when the nuthatch arrived.