Laurent Geslin / Great crested grebe (Podiceps cristatus) with chick flapping its wings. Lake Geneva, Geneva, Switzerland

Laurent Geslin / Great crested grebe (Podiceps cristatus) pair feeding their chicks, which are carried on their backs. Lake Geneva, Geneva, Switzerland

Ben Hall,Ben Hall / Great crested grebes (Podiceps cristatus) pair performing courtship displaying, Cheshire, UK, March

David Pattyn / Black necked grebe (Podiceps nigricollis) frontal view of pair mating, La Dombes lake area, France, April

Luke Massey / 2020VISION / Little grebe (Tachybaptus ruficollis) on lake, Surrey, England, UK, April.

David Pattyn / Great Crested Grebe (Podiceps cristatus) with two young chicks on her back. La Dombes lake area, France, July.

David Pattyn / Red necked grebe (Podiceps grisegena) approaching a competitor in an attempt to drive him away during the courting season, Danube area, Bulgaria, April

David Pattyn / Great Crested grebe (Podiceps cristatus) swimming in early morning light carrying chick on back, La Dombes area, France, July

Markus Varesvuo / Two Slavonian / Horned grebes (Podiceps auritius) on water, Uto, Finland, May

Ben Hall / Great crested grebes (Podiceps cristatus) performing their elaborate courtship ritual at dawn, Cheshire, UK November

Ben Hall / Great crested grebes (Podiceps cristatus) performing courtship ritual at dawn, Cheshire, UK April

Marie Read / Western grebe (Aechmophorus occidentalis) pair swimming, with reflections, Bolsa Chica Ecological Reserve, California, USA, February