FAMILY BOMBYCILLIDAE 



195 



More recently in the Canal Zone, Eisenmann (in litt.) reports seeing 

 two flocks, each with over 15 birds, on the Pipeline Road on March 7, 

 1974, (with E. S. Morton) and several flocks aggregating at least 17 

 birds, at Summit Gardens on February 6, 1973 (with Ridgely). J. J. 

 Pujals reports it on Escobal Road on March 20, 1971. N. G. Smith 

 reports seeing a group of 4 on the road above Santa Fe, Veraguas, 930 

 m. on April 7, 1975, a late date. There seem to be no reports from the 

 Azuero Peninsula or on the mainland east of the Canal Zone. 



Figure 17. — Cedar Waxwing, Chinito Cedroso, Bombycilla cedrorum. 



F. G. Stiles and S. M. Smith (Brenezia, vol. 17, 1980, p. 149) be- 

 lieve that occurrences in Costa Rica indicate it is irruptive at the south- 

 ern end of its range, possibly with 3-4 year cycles — a major irruption 

 occurred there in 1973-74, when birds were seen from December 1973 

 to mid-May 1974 at various localities. 



