NATURAL HISTORY. 



419 



Sea Gull." Less numerous than preceding, but found in similar 

 localities and at much the same times. 



220. Hhynchops nigra, Linn. — Black Skimmer. A rare, perhaps 

 accidental, visitor during the summer. (Si)ecimens seen by ourselves 

 September 8, 1858, on the Potomac river.) 



221. Graculus diloplms, Gray. — Double-crested Cormorant. A 

 specimen has been detected. 



222. Colymhus torquatus, Brunn. — Great Northern Diver. "Loon." 

 Occasionally seem during the winter. 



223. Podiceps (Pedetaithya) hoIholU, Reinhardt. — Red-necked 

 Grebe. Not uncommon on the Potomac during the winter months. 



224. Podiceps criktaf us, Lath. — Crested Grebe. " Water Witch." 

 Found on the Potomac during the winter months. 



225. Podiceijs (Dytes) cornutus, Lath. — Horned Grebe. Common 

 on Potomac in winter. 



226. Podilymhus p)odiceps, (Linn.) Lawr. — "Dipper." "Water 

 Witch." Abundant on the Potomac in winter. (We have not been 

 able to ascertain the precise times of arrival and departure of the 

 five preceding birds.) 



The birds included in the preceding catalogue are now presented 

 in sections to show at a glance those which are permanent, or summer, 

 or winter residents, and those which are regular or accidental visitants. 

 It is somewhat difficult to make out such an analytical table, from the 

 fact that of some species undoubtedly to be classed as spring and 

 autumn visitants a few individuals breed or pass the winter in secluded 

 situations, and vice versa of those which regularly pass the summer or 

 winter with us, many are more abundant in the spring and fall. We 

 have endeavored to place each species in the class under which it most 

 naturally falls, indicating irregularities of this sort in foot notes. 



Catharte? aura. 

 Falco sparverius. 

 Accipiter cooperi. 

 Accipiter fuscus. 

 Buteo borealis. 

 Buteo lineatus. 

 Buteo peuusylvanicus. 

 Cii'cus hudsouius. 

 Halisetus leucocephalus. 

 Scops asio. 

 Bubo virginianus. 

 Otus wilsonianus. 

 Bracliyotus cassini. 

 Syrnium nebulosum. 

 Picus villosus. 



Falco coliimbarius. 

 Ac[uila canadensis. 



PERMANENT RESIDENTS. 



Picus pubescens. 

 Spliyi'opicus varius. 

 Hylatomus pileatus. 

 Centurus carolinns. 

 Colaptes aiivatus. 

 Turdus migratorius. 

 Sialia sialis. 

 Ampelis cedrorum. 

 Tliriotlioriis ludovicianus 

 Certhia americana. 

 Sitta carolinensis. 

 Lophopliaues bicolor. 

 Chrysomitris tristis. 

 Spizella pusilla. 

 Melospiza melodia. 



B. 



WINTER RESIDENTS. 



Ectopistes migratoria. 

 Chaiilelasmus strcperus. 



Cardinalis virginianus. 

 Agclaius phoeniceus. 

 Sturnella magna. 

 Corvus americanus. 

 Corvus ossifragus. 

 Cyanura cristata. 

 Zenaidura caroHnensis. 

 Bouasa umbellus. 

 Meleagris gallopavo. 

 Ortyx virginianus. 

 Botaurus lentiginosus. 

 ^gialitis vociferus. 

 Pliilohela minor. 

 Aix sponsa. 



Erismatura rubida. 

 Bucepliala americana. 



