K. Selander, 1953 Xanthoeca yucas Santa Rita, 2000 ft., 5 mi. N San Fernando, Chiapas, Mex. Oct. 13 Have found about 10 different flocks here in past several days. They invariably frequent the dense parts of the forest - never forest edges or fields. Average size of flock is about 5 birds. They are very noisy and respond well to imitations of their calls & to various other calls & owl notes but in this dense vegetation they are difficult to collect. The natives here call them "quisquis" - a name apparently derived from their calls. Actually their common call sounds more like "how - how" or "cow - cow" to me. Usually 2 or notes given together in rapid succession - but often three - "how - how - how". This call is nasal in quality. Another call is liquid - whistle like - reminding me of certain notes of Centurus aurifrons. Again this call is given in two's or three's in rapid order - "chao - chao - chao". When excited the nasal calls are run together producing a confused chorus of noise when several birds call together. Their flight is rather slow and direct but they tend to work through the trees rather than flying up and over them.