Found only in these woods, the large bird is a beautiful sight, with its distinctive green and blue colouration, crested head feathers and, when in flight, the red flash of its wings.

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But Dr Dial wanted to be sure, so he compared the accomplishments of normal partridges with birds that had their wing feathers clipped to half their normal surface area, and to even less fortunate fowl whose main flight feathers were entirely plucked.

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