DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Waxbills perching. Black-faced waxbill (Estrilda erythronotos, left) and violet-eared waxbill (Uraeginthus granatinus, right) perched on an old branch. These species of finch are common in southern Africa. Photographed in Etosha National Park, Namibia.
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