Baja 1960 Polioptila caerulea Oct. 22 Isla Espiritu Santo, S end, Baja California de Sur, Mexico - This species was one of the more common on the island. The one I collected was an immature, molting rather badly. The 4 central rectrices were nearly full grown, but fell out while I was working. Oct.25 E side Isla Cerralvo, Baja Calif, Mexico - Several seen this morning. Fairly common. Oct.26 Several heard. Oct.27 little Oct.28 One collected in the morning was an adult ♀. Seen several times during the day. Oct.29 Several seen heard in morning.