Marshall (1943) Streptoprocne zonaris noted only at Mt. Cacagnatique, V. de Santa Ana, Chilata, but common & conspicuous in each place. Our camp at V. de Santa Ana was located in sort of a wide pass between two cones and thru this pass the large flock (501) Collared Swifts would stream majestically past at about the same time each afternoon, and often on cloudy afternoons - always same direction - saw south. The flock would always be in fairly close formation and the birds always flying in perfectly straight lines with no deviation for foraging. This made a very impressive and dignified show like a squadron of airplanes passing in review. Gradually they would come past as low as 150-200 ft. but I never succeeded in killing any. At other times small groups could be seen foraging very high over camp & their