-
plumage have
persisted for generations.
Ornithologists James Han**** and Jim
Kushlan also
consider the two to be a
single species, with the
differences in plumage...
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Philip (1992). Storks,
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Bloomsbury Publishing. pp. 175–180...
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Croom Helm. pp. 101–104. ISBN 0-7099-3716-4...
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About Birds,
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