710 Report of State Geologist. 



As soon as tlie lu'eeding season is over they begin to return to us. 

 About the lower end of Lake Michigan they are seen acme years the 

 latter part of July. In Cook County, 111., Mr. Parker found them 

 very abundant July 17, 1893, and Mr. J. 0. Dunn found them con- 

 tinuing abundant through the remainder of July and well into Au- 

 gust. That, however, is an unusual occurrence, the like of which has 

 not been noted in twenty years' observations. In 1889 they were 

 noted August 10th (Parker). 



They become common in t^eptember, and remain so into October. 

 Lafayette, September 14 to October 5, 1895 (Test). Mr. E. W. Nel- 

 son says it sometimes remains in northeastern Illinois \intil November 

 1. Messrs. ITlrey and Wallace note that in September they are found 

 in great abundance along the AYabash River (Proc. I. A. 8.. 1895, 

 p. 150). 



95. (--H). Tringa bairdii Coi;i:s. 



Baird's Sandpiper. 



Adult in Summer. — Middle tail feathers not projecting to any de- 

 gree beyond the rest and not noticeably pointed; middle upper tail 

 coverts, dusky, bordered with dull clay-color, the lateral ones, white; 

 middle tail feathers, nearly black, others light brownish-gray, all nar- 

 rowly edged with whilisli. Below, chest, pale buff, streakevl and 

 spotted with dusky grayish-brown; throat, sides and belly, white. 

 Crown, pale grayish-buff, broadly streaked with brownish-black: scap- 

 ulars and interscapulars, irregularly spotted with brownish-black and' 

 pale grayish-buff, the former largely predominating. 



Adult in Winter. — Above, nearly unifonn grayish-brown tinged 

 with clay color; jugulum and sides deeply suffused with clay- 

 color or dirty buff, the former very indistinctly streaked. Imma- 

 ture. — Above, light buffy-brown, streaked with dusky, the feath- 

 ers of the back and the scapulars, blackish, conspicuously bordered 

 terminally with dull white; wing coverts, dark grayish, also bordered 

 tenninally with white or light buff. Jugulnm suffused with buff and 

 indistinctly streaked. 



Length, 7.00-7.60; wing, -l:.60-4.d5; bill, .90-1.00; tarsus, l.Oo. 



ILvNnE. — America, from Patagonia and Chili, northward chiefly 

 through interior of North America to Arctic regions; rare on Atlantic 

 coast. Not reported from Pacific coast of North America. Breeds in 

 Alaska and tbe Barren Crounds. and winters south to limit of its- 

 ranae. 



