Marshall, 1942 Apheloconis unicolor Loz Esmeralda, March 17 2108-2110 coll. M. Hildebrand a midday on cleared ridge (blackberries & ferns). A flock of 6-8 calling loudly quite ~ A. calif. & same undulating flight - flying from smaller trees edge ridge (edge cloud forest on n. slope) across clear to spruces etc. & back again. Were very conspie. & easy to get. March 25 2176-8 taken from flock of about 6 which orig. in cloud forest came to my strip boots. Call harsh deep single (or 2) note imit by whistle + voice. Trained out to edge cloud forest - flight in deep undulations - would alight & call then hop into concealed place (high in trees) & be impossible to find for 10-15 min until call & fly again. One promptly seen in lone dead short pine on ridge away from forest where sitting in full view. Others heard later in this cleared area after I shot - i. not necessarily in dense cloud forest.