Marshall (1942) Crotophaga sulcirostris Lake Olomega The most abundant bird in the flat country on S side lake around camp where flocks up to 50 around edges of fields or boggy pastures. Always a flock along stream bank of camp - drift along thin brush & low trees and in midday perch in long rows on branches 5' from end shoulder to shoulder. Always a lot of conversation in low soft tones : a single "nick" and longer clucking phases. Fly very slowly and always low from bush to bush - short dist. only members of flocks keep close together. Walk on ground a lot. When pursued, a flock can remain very silent & inconspicuous. Never far out in open away from brush or sm. trees. L de Santa Ana - Laguna de las Ranas This lake bed was about 5500 ft high & was heavily forested all around except for one logged patch where there was some brush. Cows pasturing around grassy edge. A flock of about 25 ans was foraging among the cattle at edge this clearing & when pursued retired into edge of the heavy "cloud" forest where