Out of breeding season the large flocks of Knob-billed Ducks break up into same-sex groups. A group of females fly in formation to an area to feed

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Out of breeding season the large flocks of Knob-billed Ducks break up into same-sex groups. A group of females fly in formation to an area to feed for the day. Formation flying helps conserve energy.

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Size: 5800px × 3796px
Location: Ruaha National Park, Tanzania
Photo credit: © Nick Greaves / Alamy / Afripics
License: Licensed
Model Released: No

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