WESTERN SANDPIPER. 47 



August 4 (Allen). Specimens were taken July 3, 1907, at Coronado 

 de Terraba, Costa Rica (Carriker), but these may have been non- 

 breeders that had not made the northward journey. Young birds 

 migrate about a month later, and it is probably these that afford the 

 following average dates: North River, Prince Edward Island, August 

 8 (Bain); Long Island, New York, August 10 (Worthington) ; Beaver 

 Pa., August 14 (Todd); Keokuk, Iowa, August 18 (Currier). 



The average date of the last one seen at Point Barrow, Alaska, is 

 August 15, latest August 18, 1882 (Murdoch); Herschel Island, 

 Yukon, August 2, 1894 (Russell); York Factory, Keewatin, August 

 26, 1900 (Preble); Ottawa, average of the last one seen September 9, 

 latest September 17, 1892 (White); Lewiston, Me., October 17, 1900 

 (Johnson); Ossining, N. Y., October 20, 1885 (Fisher); Washington, 

 D. C, October 26, 1887 (Richmond). 



Western Sandpiper. Ereunetes mauri Cabanis. 

 Breeding range. — The western sandpiper's breeding range, as at 

 present known, is a narrow strip along the northwestern coast of 

 Alaska from the mouth of the Yukon (specimens in United States 

 National Museum) to Cape Prince of Wales (Grinnell). 



Winter range. — Though breeding only on the northwest coast, this 

 sandpiper is common in winter on the Atlantic coast from North 

 Carolina (Bishop) to Florida (Scott). This long migration across the 

 continent to the southeastward from the breeding grounds is very 

 remarkable, and is not paralleled in the case of any other shorebird. 

 It is, however, comparable with the migration of several species of 

 ducks from the Mackenzie Valley to Chesapeake Bay. The species 

 also winters from La Paz, Lower California (specimen in National 

 Museum), to southern Mexico (Lawrence), Guatemala (Sharpe), Co- 

 lombia (Ridgway), and Venezuela (Robinson), and undoubtedly to 

 the Lesser Antilles, but its distribution in the West Indies is not yet 

 known with any accuracy. 



Migration range. — In passing from the summer to the winter home, 

 the western sandpiper comes east to the Atlantic coast at least as far 

 north as Massachusetts (Henshaw), and sometimes is quite common 

 in the fall on Long Island (Braislin) and the coast of New Jersey 

 (Baily). The strange fact is that there are no corresponding records 

 from the interior to indicate the route by which these birds reach 

 New England. The species seems not to be known north of southern 

 Wisconsin (Kumlien and Hollister), Colorado (Osburn), and southern 

 Wyoming (specimen in National Museum), while in all of the Missis- 

 sippi Valley between the river and the Rocky Mountains the species 

 is so very rare as to make it improbable that any large part of the 

 New England birds migrate through this section. In fall migra- 

 tion the species is known west in the Aleutians to Unalaska Island 

 (Palmer) . 



