Photograph: Phillip Wenzel. Use only by agreement.
From the archive
The master builder: With its striking crest, the hamerkop looks almost like a small prehistoric bird. Its huge, roofed nest is among the largest in the bird world: it can grow up to two metres wide and high and weigh around 25 to 50 kilograms.
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Where it was taken
Ngorongoro Crater, Tanzania
Borders: Natural Earth