These magnificent waterbirds run in synchrony together across a shimmering lake in a mating ritual known as a 'water dance'. Set on the incredible Lake Hodges, about 30 miles north of San Diego in California, USA, a flock of black and white Western Grebes perform their unique dances during the peak of the mating season.

The swan-like birds, with their long slender necks and red eyes, gathered in their hundreds on the lake as they paired off before rushing across it together....
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