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Wing 19 to 21 inches, tail 11, tarsus 4|, bill 7. 



In the young the general plumage is a reddish brown, and the primaries have a few brown 

 spots near their tips ; bill short and whitish ; casque very small and greatly compressed, black • 

 bare skin around eves and on the throat greenish grey. The gular pouch is wanting. 





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