Another bird nearly as big as the Crested Guan and Curassow at Maquenque is the Gray-headed Chachalaca (my gallery link) and this chattering big bird is also common at my house while the other two are not. These three shots are representative of the many different looks that Chachalacas seem to have. I particularly like the second photo below of a very wet Chachalaca in a rain. 🙂 And note that both male and female have the red dewlap on their neck during mating season (unlike Crested Guans which is only the males.) In fact, male & female Chachalacas are almost identical, though males tend to be a little larger.
¡Pura Vida!