Marshall (1942) Crotophaga sulcirostris Laguna de las Ranas They were very silent & well concealed - each indiv. getting into densest foliage & one by one slipping farther away. Very wild compared to those in settled regions. Had been foraging in grass with cattle. Chilata abundant - flocks looser this trio of year - in brushy gullies around farmyards. Only around settled areas where open ground.