208 BIRDS OF THE REPUBLIC OF PANAMA PART 2 



NYCTIDROMUS ALBICOLLIS (Gmelin) : Pauraque, Capacho 



Figure 34 

 Caprimulgus albicollis Gmelin, Syst. Nat., vol. 1, pt. 2, 1789, p. 1030. (Cayenne.) 



The common ground-inhabiting goatsucker, known by its loud, ac- 

 cented call ; legs longer than in other species of the family found in 

 Panama as indicated by the length of the tarsus (see measurements). 



Description. — Length 225-250 mm. There are two color phases, 

 shown mainly in the upper surface, one deep, warm brown, the other 

 distinctly gray, with individual variation that shows complete gradation 

 between the two. Male, above gray, rufous-brown, or variously 

 intermediate between these extremes, streaked narrowly with black 

 and mottled very finely with pale gray or buff on crown, hindneck, and 

 back; primaries black, with a bar of white (sometimes washed with 

 buff) across both webs, slightly distal to the center on the outer 5 ; 



Figure 34. — Pauraque, capacho, Nyctidromus albicollis. 



secondaries black barred and spotted with buff; wing coverts and 

 tertials spotted and barred boldly with black and buff; side of head 

 bright buffy brown ; a band of white across the foreneck ; throat black 

 barred with buff; breast brown or gray, mottled with light gray or 

 buff ; rest of under surface buff, barred narrowly with dull black ; 

 outer tail feathers black, more or less mottled with buff, second and 

 third from the outside broadly white on inner web for terminal half. 



Female, and immature of both sexes, similar, but with the white 

 wing band narrower, and the light markings in the tail reduced to a 

 small terminal spot that often is partly or wholly buff, and in immature 

 birds may be absent. 



According to current understanding, seven geographic races may be 

 recognized through the range of the species, which extends from 



