Page 21 - Killdeer
        P. 21
     Gray-headed Chachalaca
                                                                               Curassows, Guans, and  Chachalacas is a family of Neotropical gamebirds
                                                                               (Cracidae).  Cracidaes are a primitive, ancestral family of gamebirds that was
                                                                               discovered to live 50 million years ago, probably originating in Central Amer-
                                                                               ica and southern North America when that area was mostly tropical. I man-
                                                                                              aged to photograph all 3 while in Costa Rica.
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