NATURAL SCIENCES OP PHILADELPHIA. 21 



Coccygus erythrophthalmus. 



Frequeut, during the migration. 



Colaptes auratus. 



Rare or occasional (one specimen taken October 10, 1870). 



The Picus querulus, although not actually observed on the 

 island, may be here noticed, as one of the characteristic species 

 of the South Atlantic States, and an abundant bird of the pine 

 swamps of the neighboring mainland, where it is resident. It is 

 easily distinguished from our other Pici proper, at any reason- 

 able distance ; first by its different note, and next by the greater 

 blending of its colors, producing a grayish appearance at a dis- 

 tance where the other species still look definitely black and white. 

 The sexes are exactly alike, except that the 9 lacks the red over 

 the auriculars, and of the same size ; average measurements 

 give 8^x15x4^; tail 3^. 



Falco sparverius. 



Frequent ; apparently resident. 



Accipiter cooperi. 



Frequent ; apparently resident. 



Accipiter fuscus. 



Specimen in September. 



Circus hudsonius. 



Very common ; resident. 



Fandion haliaetus. 



Common, especially in spring and fall. 



Haliaetus leucocephalus. 



Frequently observed at different seasons. 



Strix pratincola. 



Occasional ; specimen taken in the marsh in daylight. 



Brachyotus palustris. 



Frequent, about the marsh. 

 Cathartes aura. 



Abundant ; resident ; more numerous in summer than in winter ; 

 believed to breed in the neighboring pine swamps. 



1871.] 



