knobbilled duck sarkidiornis melanotos The extraordinary looking Knob-billed (Sarkidiornis melanotos) photographed in Rajkot, Gujarat, India by Raju Karia. Only males have the protrusion on the bill, which becomes more prominent during the breeding season Knob-billed duck - Wikipedia
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At the same time, the researchers emphasized that supplementation works best alongside proper nutrition and regular exercise
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S2CID 8203334
Some prokaryotic cells have fimbriae or pili, filamentous appendages that aid in attachment to surfaces
