FAMILY TROGLODYTIDAE 



61 



rate species from C. turdinus and its races, all of which differ in adult 

 stage in variable patterns of dark markings on the head and undersur- 

 face. 



A record by Salvin and Godman (Biol. Centr. Amer., Aves, vol. 1, 

 1880, p. 63) under the name "albibrunneus" from "Veraguas (Arce)" 

 quoted by other authors, is in error, as the species is not known from 

 that area. 



Figure 8. — White-headed Wren, Cucarachero Cabeciblanco, Campylorhynchus 



albobrunneus. 



This handsome wren is an arboreal forest inhabitant that ranges also 

 in trees and thickets bordering open lands. It is gregarious, so that 

 usually 3 or 4 are found in company, ranging from near the ground to 

 the median level, often 16 or 20 m up, or occasionally higher, in the 

 trees. Usually they move under cover among the leaves, or through 

 masses of creepers, where their presence is made known by their croak- 

 ing, grating calls, though the birds themselves remain hidden. At times 

 the notes are joined in a sequence that may be considered a song. When 



