Situated in the Sefton borough of Merseyside, the town of Formby gets it's name from a derivation from the Norse for "Village of Forni", 'Forni' being a common family name in Scandanavia at that time. Many local place-names stem from similar sources, with Viking invaders landing at various places along the North-West coast in the centuries after the Roman empire fell. The town is perched on Formby Point at the very mouth of the river Mersey, and, in fact, is used as a reference point on maps to mark the beginning of the Mersey estuary. Formby is also adjacent to the pine forests and sand dunes of a National Trust reserve housing most of the country's red squirrels, a species all but wiped out by it's more successful grey counterpart, and as such is an area of special scientific interest. The once-plentiful red squirrel is not the only wildlife to call Formby home; the area is also known for it's population of Natterjack toads, whose distinctive chorus is referred to by locals as the "Bootle Organ".