Sylvain Cordier / RF - Common loon (Gavia immer) with chick on back. Michigan, USA. June. (This image may be licensed either as rights managed or royalty free.)

Sylvain Cordier / Common Loon (Gavia immer) on lake carrying chick on back , Michigan, USA. June.

Sylvain Cordier / Common Loons (Gavia immer) one diving underwater , Michigan, USA. June.

Markus Varesvuo / Red-throated Diver (Gavia stellata) calling, Iceland, June.

Markus Varesvuo / Red-throated Diver (Gavia stellata) taking off, Iceland, June.

Markus Varesvuo / Red-throated Diver (Gavia stellata) portrait, Iceland, June.

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

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

Espen Bergersen / Common Loon (Gavia immer) flapping wings in water, Iceland, May.

John Shaw / Common loon (Gavia immer) with a chick alongside. British Columbia, Canada. June.

Marie Read / Common loons (Gavia immer), two adults and chick swimming on a misty lake in early morning, Michigan, USA. June.

Connor Stefanison / Common loon (Gavia immer) sits on her nest at sunset in the Cariboo region of British Columbia, Canada, taken with remote, May

Espen Bergersen / Red throated diver (Gavia stellata) pair on water with reflection, Troms, Norway, June.

Danny Green / Black-throated diver (Gavia arctica), Finland, June.

Danny Green / Black-throated diver (Gavia arctica) on near waters edge, Finland, June.

Danny Green / Black-throated diver (Gavia arctica) displaying, Finland, June.

Markus Varesvuo / Black-throated diver (Gavia arctica) on water, Finland, May.

Markus Varesvuo / Black-throated diver (Gavia arctica) on water, Finland, May.

Erlend Haarberg / Red-throated diver (Gavia stellata) portrait, Varanger, Finnmark, Norway, June

Laurie Campbell / Black-throated diver (Gavia arctica) Loch Maree, Beinn Eighe National Nature Reserve, Wester Ross, Scotland, June

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

Markus Varesvuo / Red-throated Diver (Gavia stellata) adult with two young chicks on water, Vaala, Finland, June

Markus Varesvuo / Red-throated Diver (Gavia stellata) on water, cleaning feathers, Vaala, Finland, June

Markus Varesvuo / Adult Red-throated Diver (Gavia stellata) on water with chick, Vaala, Finland, June

Markus Varesvuo / Red-throated Diver (Gavia stellata) portrait at edge of lake, Vaala, Finland, June

Markus Varesvuo / Red-throated Diver (Gavia stellata) taking off with fish, Vaala, Finland, June. Magic Moments book plate.

Markus Varesvuo / Black-throated diver (Gavia arctica) portrait, Finland, June

John Cancalosi / Red throated diver (Gavia stellata) taking off Shetland Isles

Chase Dekker / Common Loon (Gavia immer) spreading wings, Monterey Bay, California

Donald M. Jones / Common Loon (Gavia immer) stretching, Troy, Montana

Alan Murphy / Common Loon (Gavia immer) pair on lake at sunset, British Columbia, Canada

Alan Murphy / Common Loon (Gavia immer), British Columbia, Canada

Alan Murphy / Common Loon (Gavia immer) carrying chick, British Columbia, Canada

Donald M. Jones / Common Loon (Gavia immer) stretching wings, Troy, Montana

Michael Quinton / Pacific Loon (Gavia pacifica) parent feeding chick, North America

Michael Quinton / Common Loon (Gavia immer) adult on lake in the summer, Wyoming

Michael Quinton / Common Loon (Gavia immer) chick with hatching egg in nest in the summer, Wyoming

Michael Quinton / Common Loon (Gavia immer) parent on nest with one day old chick in the summer, Wyoming

Jim Brandenburg / Common Loon (Gavia immer) pair on Moose Lake at sunrise, Minnesota

Jim Brandenburg / Common Loon (Gavia immer) pair courtship dancing, Northwoods, Minnesota

Jim Brandenburg / Common Loon (Gavia immer) swimming, Minnesota

Winfried Wisniewski / Red-throated Loon (Gavia stellata) trio, Hellefors, Sweden

Winfried Wisniewski / Red-throated Loon (Gavia stellata) in breeding plumage, Hellefors, Sweden