78 



NORTH AMERICAN FAUNA 73 



Habitat: Primarily a species of flooded agricultural fields and muddy edges 

 of seasonally flooded wetlands. 



Baird's Sandpiper (Calidris hairdii) 

 Status: Regular migrant. 



Migration: Rare spring and uncommon fall migrant in the Western Upland, 

 rare to absent elsewhere. Spring migrants arrive about 5 May (earliest— 

 20 April 1974, St. Croix County) and depart by 5 June. Fall migrants return 

 15-20 August and depart by 15 September. 



Habitat: Primarily a species of temporarily flooded agricultural fields and 

 edges of seasonally flooded wetlands. 



Pectoral Sandpiper [Calidris melanotos) 

 Status: Regular migrant. 



Migration: Common to locally abundant spring and common faU migrant in 

 the Western Upland and Central Plain, uncommon in the Northern High- 

 land. Spring migrants arrive about 15 April (earliest— 4 April 1964 and 

 1976, St. Croix County) and peak abundance occurs 5-10 May. During this 

 period, flocks of up to 150 individuals are commonly observed. Spring mi- 

 grants depart by 1 June. Fall migrants return about 10 July, and peak abun- 

 dance is 15 August to 1 September. Small flocks are observed in early Octo- 

 ber and departure occurs by 30 October (latest— 15 November 1964, Burnett 

 County; Kemper 1965). 



Habitat: Pectoral sandpipers use a variety of wetland habitats including 

 temporarily flooded, Northern Sedge Meadow, Shrub Carr, exposed muddy 

 edges of seasonally flooded wetlands and man-made impoundments, and St. 

 Croix River islands. 



Dunlin {Calidris alpina) 

 Status: Regular migrant. 



Migration: Uncommon migrant throughout the Valley. Spring migrants 

 arrive about 5 May, reaching peak abundance 15-20 May. Departure occurs 

 1-5 June. Fall migrants arrive about 20 August and have departed by 

 10 October (latest-28 October 1960, St. Croix County). 



Habitat: Primarily a species of temporarily and seasonally flooded wetlands, 

 man-made impoundments, and St. Croix River islands. 



Stilt Sandpiper [Micropalama himantopus) 

 Status: Regular migrant. 



Migration: Rare spring and uncommon fall migrant in the Western Upland, 

 rare to absent elsewhere. Spring migrants arrive about 5 May (earliest— 



