. Bonner zoologische Monographien. Zoology. 85 cinereiceps-mira-chocoensis (Vaurie 1965). Allopatric with O. garrula of northern Colombia. The Gray-headed Chachalaca is quite common in thickets and secondary growth around the large clearings of Sautatä on the lower Atrato River. I also observed flocks of ten to twenty individuals around Titumate and Acandi near the western shore of the Gulf of Uraba as well as at Juradö on the Pacific coast. De Schauensee (1950 a) reported this bird from the Rio Salaqui and I saw a group of five birds along the Rio Napipi, presently the southernmost record of
. Bonner zoologische Monographien. Zoology. 85 cinereiceps-mira-chocoensis (Vaurie 1965). Allopatric with O. garrula of northern Colombia. The Gray-headed Chachalaca is quite common in thickets and secondary growth around the large clearings of Sautatä on the lower Atrato River. I also observed flocks of ten to twenty individuals around Titumate and Acandi near the western shore of the Gulf of Uraba as well as at Juradö on the Pacific coast. De Schauensee (1950 a) reported this bird from the Rio Salaqui and I saw a group of five birds along the Rio Napipi, presently the southernmost record of this species in western Colombia (Fig. 28). Ortahs garrula (Humboldt) Chestnut-winged Chachalaca Specimens: None. Taxonomy: Monotypic and endemic in northern Colombia; parapatric with O. ruficauda.; allopatric with O. cinereiceps (Fig. 28). I have frequently heard and observed this noisy bird in the upper Sinü Valley. It gives a conspicuous, loud, far-carrying chorus which starts low and increases in loudness and may end rather abruptly. According to the local people the female asks the male "Se cae la casa?" and the male answers "No se cae, no se cae!' in rapid succession, which imitates the song rather well. The Chestnut-winged Chachalaca is common in dense thichets and tall second growth of northern Colombia (Fig. 28), entering clearings in the upper Sinü Valley. As of 1966 it had not yet reached the Rio Verde, a western headwater stream of the Rio Sinü. No chachalaca is found in the. Fig. 28: Distribution of the Chachalacas, Ortalis motmot superspecies, in north- western South America (modified from Vaurie 1965). Mountains above 1000 m elevation are outlined in Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bonn, Zoologisches Forschungsinstitut und Museum Alexander Koenig
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