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.

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

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

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) displaying, Finland, June.

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

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

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