FAMILY TUKDIDAE 



149 



100.0-106.4 (103.2), tail 68.1-75.2 (70.2), culmen from base 15.5-17.9 

 (16.9), tarsus 27.1-30.2 (29.5) mm. 



Females (10 from Alaska to Newfoundland), wing 95.4-99.2 

 (97.8), tail 65.2-68.6 (66.4), culmen from base 16.0-17.9 (17.0), tarsus 

 27.4-32.2 (29.9) mm. 



Migrant. Gray-cheeked Thrushes are noted especially in the period 

 of fall migration; most of those seen are probably the nominate sub- 

 species, although bicknelli and aliciae (if it can be distinguished) may 

 also occur. Specimens of the nominate race definitely identified are 2 

 recorded by Chapman (Auk, 1931, p. 121) taken by R. R. Benson at 

 Cocoplum, Bocas del Toro, October 31 and November 1, 1927. Others 

 that I have examined are as follows: a male in the British Museum 

 taken by Arce on the Volcan de Chiriqui in 1870 (date not specified) ; 

 a male taken by B. Feinstein at the old Tacarcuna Village in Darien 

 February 11, 1959; another male from the same locality that I col- 

 lected March 5, 1964; 2 (from the Gorgas Memorial Laboratory) 

 taken at Almirante, Bocas del Toro, a female on October 12, 1962, and 

 another with sex not marked on October 6, 1962. This race winters 

 from Nicaragua to northern Peru and northwestern Brazil. 



In extensive netting operations, Dr. Pedro Galindo, assisted by E. 

 Mendez and Abdiel Adames (Bird-Banding, vol. 34, 1963, pp. 202-209) 

 banded 264 of these thrushes at Almirante from October 15 to the end 

 of November, 1962. None were taken in the following spring period. 

 In 1963 the first record for fall was October 2. In 1964, on January 29, 

 1 was netted followed by others on April 22 and 24. In fall, the first 

 appeared September 25 and the last on November 25. Willis (Living 

 Bird, 1966, p. 203) found them fairly common on Barro Colorado Is- 

 land in 1960 from October 5 to December 3. He recorded 15 on No- 

 vember 1. The following year he noted migrants commonly from 

 October 12 to November 24, and single birds seen subsequently on 

 January 25, February 4, and April 15, 1961. They were noted regu- 

 larly around moving ant swarms, apparently in search of other insects, 

 not the ants. 



Loftin (Carib. Journ. ScL, vol. 3, no. 1, 1963, p. 6) reported banding 

 65 of this species near Almirante October 19-21, 1962, with 2 on No- 

 vember 10-11, 1962, and a few in the Canal Zone near Corozal and 

 Curundu in November 1962. 



CATHARUS FUSCESCENS (Stephens): Veery, Zorzal Lomo Oscuro 



Size medium; upper surface dull rufous-brown; sides grayish white, 

 without markings. 



