Great Northern Diver, Isle of Mull | Joel Walley Wildlife Photography
The Great Northern Diver (Gavia immer) is the largest of the diver family to be found in the UK. Also known as the Common Loon, divers calls in the breeding season can resemble hysterical laughter and this is one suggestion for this historic name. A heavy bird, the Great Northern Diver weighs up to 8kg and sits low in the water. This helps it to dive down to 60m, but makes it a poor flyer and clumsy on land. Although rare elsewhere in the UK, we commonly watched Great Northern Diver around the shores of Loch Na Keal, Loch Scridain and Loch Spelvie where they would dive below the surface in search of prey often for over a minute and a half at a time.