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Its long neck resembles a snake ready to strike when the Anhinga - also called a snakebird - is swimming.

The heron, the snakebird, and the redshank, waded through the shallow drifts; and geese, widgeon, teal, and mallard, rose whirring in the air at every step.

In Plotus, the snakebird, the pyloric chamber of the stomach is beset with a mass of hair-like stiff filaments which permit nothing but fluid to pass into the duodenum.