The TLSA supported more than 10% of the biogeographic populations of black-bellied plover
(Pluvialis squatarola), semipalmated sandpiper (Calidris push/a), and dunlin (C.
Foraging behavior of black-bellied plover
Look for whimbrel, long-billed curlew, black-bellied plover
, Pacific golden plover, greater yellowlegs, ruddy turnstone or long- and short-billed dowitcher - species that are many times seen only at this time of year for a period of a few weeks.
Marbled godwits included polychaetes in their diet, long billed curlews and whimbrels ate crabs, especially a fiddler crab, Uca crenulata, willets ate bivalves (Macoma spp.) and crabs, and black-bellied plover
ate bivalves and gasteropods, especially Bulla gouldiana.
Peak numbers for the following widespread shorebirds were recorded on this plot: Calidris spp.: 7700 on 5 January 1994; dowitchers: 2290 on 5 January 1994; Black-bellied Plover
: 1450 birds, on 27 November 1993; and Willet: 1100 on 11 January 1994.
A black-bellied plover
, wintering here from its summer range on the arctic tundra.
We used the ground transect data to create resource selection functions (RSF; Manly et al., 2002) in TreeNet (Salford Systems, 2003) to assess habitat selection for 12 relatively common shorebird species: American golden-plover (Pluvialus dominica), black-bellied plover
(Pluvialis squatarola): Black-bellied plovers
occurred on 15.4% of our survey clusters (Table 1).
In 1995, the red phalarope was the most common species, followed by white-rumped sandpiper, pectoral sandpiper (Calidris melanotos), black-bellied plover
(Pluvialis squatarola), and American golden-plover (Table 2).
Several additional shorebird species are also candidates in some of the easterly movements, e.g., buff-breasted sandpiper Tryngites subruficollis, red-necked phalarope Phalaropus lobatus, Baird's sandpiper Calidris bairdii, ruddy turnstone Arenaria interpres, sanderling Calidris alba, and black-bellied plover
Conversely, 21 species occurred after 1950 that had not been reported prior to that year: green-winged teal, northern pintail, greater scaup, common goldeneye, red-breasted merganser, golden eagle, gyrfalcon, black-bellied plover
, ruddy turnstone, sanderling, least sandpiper, white-rumped sandpiper, Thayer's gull, Iceland gull, glaucous gull, American robin, northern wheatear, yellow-rumped warbler, blackpoll warbler, Harris's sparrow, and white-crowned sparrow.
Species (1) No modelling, direct extrapolation Estimate [+ or -] SE Black-bellied plover
6205 [+ or -] 6234 Lesser golden-plover 1726 [+ or -] 2414 Ruddy turnstone 25066 [+ or -] 11198 Semipalmated sandpiper 12022 [+ or -] 9953 White-rumped sandpiper 129846 [+ or -] 35344 Red phalarope 188684 [+ or -] 25144 All species (1) 363549 [+ or -] 66434 [Part 2 of 3] TABLE 4.