Hendrickson 1950 Stelgidopteryx ruficollis Oct. 23 5km. N. Villanueja, 1400 ft., Huila, Colombia, S.A. Frequently seen working above quebrada S. of camp (in area about "1/2 mile W of camp especially). Nest holes in quebrada banks noted repeatedly between camp and Magdalena River, but in no case were swallows seen perched at the nest holes. Opened two holes; about 8" and about 15" back of opening found scattered nest materials. Both tunnels were clear of spider webs and might have been used for roosting; neither contained eggs or birds. One specimen taken in flight, three taken from perches in trees near the water. Perches most commonly observed today were of two kinds: top leafy spray of taller trees; hanging dead limbs beneath main leafy mass of tree. Oct. 25 Many (50-100 in 1 block of stream bed) working over quebrada at about 5 km S of camp 7:00 this morning. This was directly S of camp. Perico says he thinks they nest in the quebrada banks East of camp. Oct. 28 Shot a J (H#1473) which was perched on a dead twig in top of tree beside quebrada W of camp. Only one or two seen flying, 9:00-12:00 in morning. Local name is (general) "zondrina"