BLACK TERN 



5. Hydrochelidon nigra surinamensis (Gmelin) 

 Black Tern 



Length 255 mm. (10.00 in.); tail 79 mm. (3.10 

 in.). 



Sexes alike. Adult. Summer plumage. 



Head, neck and under parts sooty black or 

 grayish black; under tail coverts white; upper 

 parts slate color ; bill and feet black. Winter 

 plumage. Forehead, back of neck and under 

 parts white; rest of upper parts deep pearl gray. 



Young. Similar to winter adults, but the 

 upper parts somewhat washed and tipped with 

 brownish; the sides washed with grayish. 



Tail only slightly forked. 



A migrant. Recorded by Jewel from Gatun 

 Lake in December and June. In size and 

 manner of flight it bears some resemblance to 

 the night hawks (Chordeiles). 



6. Anoiis stolidus (Linnaeus) 

 Noddy 



Length 395 mm. (15.50 in.); tail 155 mm. 

 (6.10 in.). 



Sexes alike. Adults very dark sooty brown, 

 shading through gray to white on the forehead, 

 the under parts somewhat lighter than the back. 

 Tail short, rounded. 



Young. Similar to but somewhat lighter 

 than adults ; no white on forehead ; a whitish line 

 above eye. 



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