NATURAL HISTORY, 



419 



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

 localities and at much the same times. 



220. Rhynch.ops nigra, Linn. — Black Skimmer. A rare, jjerhaps 

 accidental, visitor during the summer. (Specimens seen by ourselves 

 September 8, 1858, on the Potomac river.) 



22 L Gfacidus dilophus, Gray. — Double-crested Cormorant. A 

 specimen has been detected. 



222. Colymbustorquatus, Brunn. — Great Northern Diver. "Loon." 

 Occasionally seen during the winter. 



223. Fodiceps ( Pedetaitlnja) holholU, Reinhardt. — Red-necked 

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



224. Podiceps cristatus, Lath. — Crested Grebe. " Water Witch." 

 Found on the Potomac during the Avinter months. 



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

 on Potomac in winter. 



226. Podilymhus podiceps, (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. 



Cathartea aura. 

 Falco sparverius, 

 Accipiter cooperL 

 Accipiter fuscus. 

 Buteo borealis. 

 Buteo lineatus. 

 Buteo pennsylvanicus. 

 Circus hiidsonius. 

 Halisetus leucocephalus. 

 Scops asio. 

 Bubo virginianus. 

 Cms wilsoniauus. 

 Brachyotus cassini. 

 Syrnium uebulosuiru 

 Picus villosus. 



Falco columbarius. 

 Aquila canadensis. 



PERMANENT RESIDENTS. 



Picus pubescens. 

 Sphyropicus varius- 

 Hylatomus pileatus. 

 Centurus carolinus. 

 Colaptes auratus- 

 Tardus migratorius. 

 Sialia sialis. 

 Ampelis cedrorum. 

 Thriotliorus ludovicianus. 

 Certhia americana. 

 Sitta carolinensis. 

 Lophophaues bicolor. 

 Chrysomitris tristis. 

 Spizella pusilla. 

 Melospiza melodia. 



B. 



Cardinalis virginianus. 

 Agelaius plioeuiceus. 

 Sturnella magna. 

 CorvTis americanus. 

 Corvus ossifragus. 

 Cyanura cristata. 

 Zenaidura carolinensis. 

 Bont^Ba tunbeUus. 

 Meleagris gallopavo. 

 Ortyx virginianus. 

 Botaurus lentiginosus. 

 ^gialitis vociferus. 

 Philobela minor. 

 Aix sponsa. 



WINTER RESIDENTS. 



Ectopistes migratoria. 

 Cliaulelasmus streperus. 



Erismatura rubida. 

 Bucephala americana. 



