Charles Darwin (1809-1882), American Flamingo (Phoenicopteru 5 S/. — Equateur, 1983
Charles Darwin (1809-1882), American Flamingo (Phoenicopteru (Equateur, 1983), valeur faciale 5 S/., série « Ecuadorian Rule over Galapagos Islands, 150th…
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Ecuadorian Rule over Galapagos Islands, 150th Anniv.