Not too difficult, Mike. Males (and juvs) have all-black bills. Females have an orange lower bill. Adults have orange feet, but juvs have black feet.

A NICE SHOW OF A SINGLE KINGFISHER ON THE RIVER GLAZE WHERE IT RUNS UNDER WARRINGTON RD NEAR THE GREYHOUND, INCIDENTLY CAN ANYONE OUT THERE TELL ME THE DIFFERENCE IN THE SEXES OF THE KINGFISHER, REGARDS MIKE