I4O BIRDS OF THE REPUBLIC OF PANAMA PART 4 



While known widely as one of the species called cased, locally this 

 familiar bird has other names, as platanera in Herrera, capasucia in 

 southern Veraguas, and si quiere near Almirante, the last perhaps in 

 imitation of its curious whining call. 



The species is widely distributed through Central America north to 

 southern and eastern Mexico, (even casually reaching Texas) and 

 south to northern Colombia. Northward, the race casius extends from 

 Panama through Costa Rica on both slopes. On the Caribbean side it 

 crosses the Colombian border in eastern San Bias to Acandi on the 

 western shore of the Gulf of Uraba. 



H. Loftin (Eisenmann in litt.) reports one banded at Ancon, Canal 

 Zone, on September 6, 1964, recaptured dying on April 13, 1974, at 

 Balboa, less than 1 km from the banding site. Another, banded at 

 Gamboa on October 23, 1964, was found dead in June 1968 within 3 

 km of the banding site. 



TURDUS PLEBEJUS PLEBEJUS Cabanis: Mountain Robin, 

 Casca Serrana 



T urdus plebejus Cabanis, Journ. fur Orn., vol. 8, September 1860 (January 1861), 

 p. 323. (Costa Rica.) 



Adults brownish gray, darker above, lighter below; with black or 

 blackish brown bill. 



Description. — Length 235-250 mm. Adult (sexes alike), above dark 

 olive-brown to brownish gray with the crown faintly darker; lighter, 

 grayer below, with the abdomen more or less grayish white; throat 

 faintly streaked with brownish black; undertail coverts with wedge- 

 shaped dusky markings; underwing coverts dull brown, margined with 

 tawny. 



Immature, like adult, but with small tips of buff on the outer greater 

 primary wing coverts and breast. (These are soon lost, so that the 

 juvenile individual rapidly becomes like the adult). 



Kennard (Proc. Boston Soc. Nat. Hist., vol. 38, 1928, p. 460), in a 

 male taken March 13, 1926, on the Boquete Trail, noted that the bill 

 was "blackish brown; iris raw umber, tarsus brown." 



Measurements. — Males (11 from Chiriqui), wing 127.7-140.6 

 (136.7), tail 92.3-99.9 (94.8), culmen from base 22.7-25.0 (23.7), 

 tarsus 31.5-34.5 (33.4) mm. 



Females (11 from Chiriqui), wing 122.9-134.8 (130.0), tail 88.0- 

 94.5 (92.6, average of 10), culmen from base 22.7-24.4 (23.7), tarsus 

 32.1-35.0 (33.5) mm. 



