BIRDS OF ONTARIO. 29 



(241) Baird's Sandpiper. 



(Actodromas bairdii.) 

 A regular and not uncommon visitor in the neighbourhood of To- 

 ronto and at Dundas. Not seen in spring. 



Arrives in July, departs early in October. 



(242) Least Sandpiper. (Stint.) 



(Actodromas minutilla.) 



Common spring and autumn visitor, arriving about the twentieth of 

 May, departing early in September. 



The bulk of these birds go north to breed, but I think some nest 

 throughout their range in this Province, for some few pairs are always 

 to be found on our sandy beaches all through the summer. 



Genus PELIDNA. 



(243a) Red-backed Sandpiper. (Black-heart Plover.) 

 (Pelidna alpina sakhalina.) 



A very abundant visitor in the spring, arriving about the twentieth 

 of May and departing northward about the end of the first week in June. 



In the autumn they are much less abundant, the bulk of them going 

 south by another route. The first arrive early in October and by the end 

 ■of the first week in November the last has gone. 



Genus EREUNETES. 



(246) Semi=palmated Sandpiper. (Stint.) 

 (Ereunetes pusillus.) 



Very abundant from about the twentieth of May to the end of the 

 first week in June and from the middle of July until the end of the first 

 -week in September. 



The bulk of them go further north to breed, but I have always found 

 some pairs here during the summer. 



^ Genus CALIDRIS. 



(248) Sanderling. 



(Calidris arenaria.) 

 Very abundant in spring and autumn along the lake shores. Arrive 

 about the tenth of May, depart in October. They spend the summer 

 on their breeding grounds in the far north. 



