Bolivia issued this set of four stamps on May 16th, 2015 featuring fauna in danger of extinction which included 2 stamps with birds. One was inscribed "Fulica cornuta" and the photograph credited to "Omar Rocha O.".
Fulica cornuta should have a projection above the bill which gives the species its "horned" name, and the legs should be dull greenish. The bird on the stamp has red legs, and no "horn". The yellow shield at the base of the bill, and ridges above the eyes all lead to identifying this bird as a Giant Coot (Fulica gigantea) which must be an embarassment to Bolivia Post. I wonder if the photographer submitted the wrong photograph or was not aware of the species he was observing.
The other bird stamp correctly shows Harpy Eagle (Harpia harpyja)
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