Markus Varesvuo / Black-throated Diver (Gavia arctica) Vaala Finland June

Mark Hamblin / 2020VISION / Red-throated diver (Gavia stellata) adult pair displaying on breeding loch, Flow Country, Highland, Scotland, UK, June. Did you know? The Flow Country of Caithness and Sutherland is home to the larges...

Mark Hamblin / 2020VISION / Red-throated diver (Gavia stellata) adult on breeding loch, Flow Country, Highland, Scotland, UK, June,

Mark Hamblin / 2020VISION / Red-throated diver (Gavia stellata) adult on breeding loch, Flow Country, Highland, Scotland, UK, June, vertical crop of image number 01358766

Orsolya Haarberg / Black-throated diver (Gavia arctica) portrait on water, Pasvik, Finmark, Norway, June

Wild Wonders of Europe / Cairns / Red throated diver (Gavia stellata) on water, in breeding plumage, Bergslagen, Sweden, April 2009

George Sanker / Common loon (Gavia immer) nesting at edge of lake and calling, Acadia National Park, Maine, USA, August

SCOTLAND: The Big Picture / Black throated diver (Gavia arctica) swimming, Assynt, Sutherland, Highland, Scotland, UK, June.

Mark Hamblin / 2020VISION / Female Red-throated diver (Gavia stellata) incubating eggs, Shetland Isles, Scotland, UK, June.

Mark Hamblin / 2020VISION / Red-throated diver and chick (Gavia stellata) on breeding loch, Shetland Isles, Scotland, UK, June.

Thomas Lazar / Common loons (Gavia immer) fighting over teritory dispute, one protecting nest from intruder. Allequash Lake, Northern Highland State Forest, Wisconsin, June.

Thomas Lazar / Common loons (Gavia immer) fighting over teritory dispute, one chasing the other, Allequash Lake, Northern Highland State Forest, Wisconsin, June.