P. PEARSON 1950 Crotophaga ani June 17 Saw 2 of sp.? attempting copulation. Probably ani but maybe major. June 23 Two fp shot today and a flock of 40+ more were flying. June 24 3028, 3029, and 3044 are part of one flock; 3032, 3033, 3034 another. July 17 Saw what were almost certainly C. ani (about 5) in same tree with about 10 C. sulcirostris. Good view but no specimens. July 20 Scared a flock of about 6 C major out of a tree. In the top was a nest with 5 half-grown young settling on edges of adjacent branches. July 22 In distinguishing between the 3 species of Crotophaga, leads size, thebuds of bill, and iris; sulcirostris has a more sibilant note than ani, major more of a croak. Also, sulcirostris is more nervous and defertable, jumps around in bushes more when disturbed. Sulcirostris seems to be the most widespead and abundant. July 30 C. ani was more abundant along the road between Castillo & Jorano than sulcirostris.