Vol l907 IV ] Cameron, Birds of Custer & Davenport Counties, Mont. 247 



List of Species. 



1. Colymbus nigricollis calif ornicus. American Eared Grebe. — 

 Not common. A young male was shot by the ferryman at Terry on Octo- 

 ber 2, 1904, when I kept the skin. Mr. J. H. Price obtained an immature 

 example in summer plumage on Locate Creek and made a skin. I saw two 

 adults floating down the Yellowstone on May 7, 1905. 



2. Podilymbus podiceps. Pied-billed Grebe. — Not common. Sixteen 

 seen May 23, 1904, and eight May 31, 1904. Their manner of diving 

 backwards with head up stream was very noticeable. 



3. Larus argentatus. American Herring Gull. — Tolerably common, 

 flying up or down the Yellowstone in the fall. 



4. Larus delawarensis. Ring-billed Gull. — Tolerably common. Oc- 

 curs in spring and fall on the Yellowstone. An adult specimen was shot 

 by the ferryman at Terry, May 31, 1906. 



5. Larus Philadelphia. Bonaparte's Gull.— Rare. A Bonaparte's 

 Gull in first plumage was shot by Mr. Charles Mackay on August 12, 1904. 

 It was flying over a small lake at his ranch twenty-two miles from Terry. 

 An adult observed by me flying down the Yellowstone on July 31, 1905. 



G. Xema sabinii. Sabine's Gull.— Rare. An immature example 

 of this gull was shot on the Yellowstone by the ferryman at Terry, Sep- 

 tember 23, 1904. He said he had seen about twenty-five others of this 

 species on the previous day. 1 



7. Hydrochelidon nigra surinamensis. Black Tern. — Erratic migrant 

 in both counties. Ten seen June 8, 1895; three August 6, 1898; two 

 July 2, 1905; one May 26, 1906; and two May 30, 1906. Mr. J. H. Price 

 has also observed it in his vicinity (Knowlton). Extraordinarily tame 

 when hovering over prairie ponds. 



8. Phalacrocorax dilophus. Double-crested Cormorant. — Rare. A 

 single bird was seen by my wife sitting behind a rock, at the edge of the 

 Yellowstone, on October 16, 1904. When she was quite close it flapped 

 into the water. 



9. Pelecanus erythrorhynchos. American White Pelican. — Rare. 

 Mr. Dan Bowman is positive that a pair of pelicans nested on a small 

 wooded island in the Powder River near the mouth of Locate Creek during 

 the summer of 1884. He constantly saw both birds flying there, when 

 camped on the river during the months of June and July, and later one 

 only (as he supposed the male), fishing along the river bank. Unfortu- 

 nately he did not investigate. Peter Lorenson shot two specimens near 

 Miles City on September 5, 1898. Mr. A. S. Wiley shot a pelican on the 

 Yellowstone in 1903. 



10. Merganser americanus. American Merganser. — Rare. On No- 



1 See Auk, Vol. XXII, p. 76, 1905. 



