J Davis 18, Playa de Santiago, 7 km. NW Mangasillo, Chino Nov. 4, 1957. Smooth rocks together, & a loud, distinctive song, but they strike to the brush & rarely come out in the open. They respond at once to squeak's owl calls, by calling, & will come close, but keep to cover, in which they actively move about. They are reminiscent of S. erythrophthalmae, but are possibly even more reluctant to expose themselves when excited by squeak's owl calls. Two caracaras were seen several times, circling above an open field. Size disparity suggested that they were paired. The river, wide & shallow, with broad sandy banks, is surprisingly bereft of water birds, 2 American egrets & 2 stilts noted. Rough-winged swallows were abundant, circling over the river, and hundreds were seen along power lines on the wayback. Ver- million Flycatchers were common along the river, both in open fields, where they forched on vine tangles or cornstalks, & in open woods, where they forched at, or was the tops of trees. Boat-tailed Grace- fles were common in both woods & fields. A flock of 20+ rode down a sandbar in the middle of the river, obviously feeding on what (?). Hooded and Scarlet-headed Orioles, Social Derby Flycatchers, 7 so- ciol Kingbirds, all common. Also grackles. I have yet to see a Boligdila with a black cap. One ? (or young?) Bladyfaria seen in tall tree, 20 ft up,