1C>6 BIRDS OF THE REPUBLIC OF PANAMA PART 2 



5. Tarsus bare, except at the proximal joint ; tail nearly as long as wing. 



Pauraque, Nyctidromus albicollis, p. 208 



Tarsus feathered on front for about one-half of length ; tail not more than 



three-fourths as long as wing 6 



6. With a white (male) or buffy (female) band across the outer primaries; 



abdomen plain, without markings. 



White-tailed nightjar, Caprimulgus cayennensis albicauda, p. 220 

 Without a white or buff band across the outer primaries 7 



7. Without a light band on lower foreneck; inner webs of primaries black, 



with very few rufous markings or none. 



Dusky nightjar, Caprimulgus saturatus, p. 219 



With a distinct light band on lower foreneck; inner webs of primaries 



regularly barred with cinnamon-buff 8 



8. Color predominantly rufescent brown and deep buff; larger, wing 170 mm. 



or more, usually 175-180 mm. 



Rufous nightjar, Caprimulgus rujus minimus, p. 215 

 Color predominantly grayer, marked with black; buff colors paler; smaller, 

 wing usually less than 165 mm. 



Whip-poor-will, Caprimulgus vocijerus vocifcrus, p. 218 



LUROCALIS SEMITORQUATUS NOCTIVAGUS Griswold: 

 Short-tailed Nighthawk, Tapacamino Selvatico 



Figure 32 



Lurocalis scmitorquatus noctivagus Griswold, Proc. New England Zool. Club, 

 vol. 15, p. 101. (Salamanca Hydrographic Station, northern end of Madden 

 Lake, Canal Zone.) 



A nighthawk blacker than others, without a white bar in the wing ; 

 tail very short ; flight erratic. 



Description. — Length 190-200 mm. Tarsus feathered. Adult (sexes 

 alike), upper surface black from forehead to upper tail coverts, includ- 

 ing side of head, wing coverts and scapulars, dotted with more or less 

 elongated spots of tawny; primaries with a few broken bars of tawny 

 on outer web, tipped narrowly with white; inner secondaries and 

 longer tertials barred heavily with grayish white, to form a prominent 

 light spot on the upper surface of the closed wing ; tail barred brokenly 

 with pale tawny, tipped lightly with buff and white ; neck and breast 

 dull black, spotted rather heavily with pale tawny ; a narrow transverse 

 white band across throat; abdomen, flanks, under wing coverts and 

 under tail coverts tawny brown, barred heavily with black. 



Immature, with an irregular mixture of gray mottled with sooty and 

 spotted heavily with brown and black on crown, back, and wing co- 

 verts ; white throat band slightly barred with black. 



A male, shot on Isla Cebaco January 13, 1965, had the iris wood 

 brown ; bill dull black, shading toward dull brown at the gape ; bare 



