1885.] Agersborg on Birds of Southeastern Dakota. 2 §3 



those of summer, and the change of color is so sudden as to preclude its 

 being due to the spring moult. 



101. Tyrannus carolinensis. Kingbird. — Abundant summer resident; 

 breeds. 



102. Tyrannus verticalis. Western Kingbird. — Rare; breeds. Does 

 not seem to go so far away from its nesting-places as the Kingbird, and is 

 hardly ever found any distance out on the prairies. More common a hun- 

 dred miles north of here, along the Big Sioux River, than at this place. 



103. Sayornis fuscus. Phcebe. — Very rare ; breeds. 



104. Empidonax minimus. Least Flycatcher. — Abundant; breeds. 



105. Empidonax hammondi. Hammond's Flycatcher. — Not com- 

 mon ; breeds. Only two fully identified nests with eggs found. 



106. Caprimulgus vociferus. Whip-poor-will. — Summer resident; 

 breeds. 



107. Phalaenoptilus nuttalli. Poor-will. — More abundant than the 

 foregoing; breeds. 



108. Chordeiles popetue. Nighthawk. — Abundant during the migra- 

 tions, intermingling with var. henryi, which latter form is the only one 

 I have found breeding here. Its favorite nesting places seem to 

 be large isolated rocks or boulders, which here and there crop out on the 

 prairies. 



109. Chaetura pelasgica. Chimney Swift. — Rare; breeds. 



no. Trochilus colubris. Ruby-throated Hummingbird. — Rather 

 common ; breeds. 



in. Ceryle alcyon. Kingfisher. — Not very common; only a few 

 pairs seen each summer; breeds. 



112. Coccygus erythrophthalmus. Black-billed Cuckoo. — Common; 

 breeds. 



113. Coccygus americanus. Yellow-billed Cuckoo. — I have so 

 far failed to find this species here, although it is said by Professor Aughey 

 to be common a few miles south of here, in Cedar and Dixon Counties, 

 Nebraska. 



114. Hylotomus pileatus. Pileated Woodpecker. — Probably only a 

 winter visitor in the heavy timber along the Missouri River. Have 

 never seen it later than the last week in April. 



115. Picus villosus harrisi. Harris's Woodpecker. — Common; 

 breeds. Much more abundant in winter than in summer. 



116. Picus pubescens. Downy Woodpecker. — Same as the last. 



117. Centurus carolinus. Red-bellied Woodpecker. — Rare summer 

 visitor; probably breeds. 



118. Melanerpes erythrocephalus. Red-headed Woodpecker. — 

 Common summer resident; breeds. Have on several occasions noticed 

 its habit of storing grasshoppers in cracks and crevices for further use. 

 Necessity often compels this bird to build its nest under roofs or in any 

 dark hole it may find on the treeless prairie farms, a habit it has in com- 

 mon with the next. 



