214 SORA 
Two records. It is believed that the Sora is much 
more regularly to be found in the Wenham Swamp 
than the records show; possibly its arrival may be 
slightly behind the average date of the River trip. 
The presence of both Rails is also somewhat regulated 
by the height of water over the marshes. 
228 Woodcock 
Two records only, but this bird is undoubtedly a 
summer resident of the valley. On both occasions the 
bird disclosed his presence only through his flight song. 
230 Wilson’s Snipe 
One record. Probably a late migrant. 
240 White-rumped Sandpiper 
One record only, but probably always present during 
the May shore-bird migration which, however, reaches 
its height along our coast about May 30th. 
242 Least Sandpiper 
Nine records. Always to be found along the shore of * 
Plum Island Sound, and several times seen in the 
fresh water marshes of the River valley. 
246 Semi-palmated Sandpiper 
Six records. Owing to the great difficulty in dis¬ 
tinguishing this species from the preceding, the actual 
records are not quite representative, as this bird is 
undoubtedly always present during mid-May near 
Clark’s Pond or along the shores of Plum Island 
Sound. 
:254 Greater Yellow-legs 
Eleven records. An early season may cause all of 
these migrants to pass through, but they are usually 
found and sometimes in large numbers on both the 
fresh and salt water marshes of the River. 
.256 Solitary Sandpiper 
Thirteen records. A common migrant in the valley. 
22 
