Species could be categorized into one of four groups on the basis of similar patterns of density (Table 4): 1) a coastal group that had higher densities on the OCP and included the ruddy turnstone, dunlin, pectoral sandpiper, and red phalarope; 2) a widespread group that had approximately equal densities on the OCP and ICP and included the black-bellied plover, semipalmated sandpiper, longbilled dowitcher, and red-necked phalarope; 3) an inland group that had higher densities on the ICP and included the American golden-plover and stilt sandpiper; and 4) a group of species encountered in low numbers that could not be compared between regions, and which have high uncertainty associated with their estimates (bar-tailed godwit, Baird's sandpiper, and buff-breasted sandpiper).
Coastal species include ruddy turnstone, dunlin, pectoral sandpiper, and red phalarope; Widespread species include black-bellied plover, semipalamated sandpiper, long-billed dowitcher, and red-necked phalarope; and Inland species are represented by American golden-plover.
Researchers led by Bart Kempenaers from the Max Planck Institute for Ornithology in Seewiesen found that during the three-week mating period male pectoral sandpipers (Calidris melanotos) are active for up to 95 percent of the time.
Pectoral sandpipers have a polygynous mating system where one male mates with several females.
During spring migration to their Arctic breeding grounds, Pectoral Sandpipers
stop periodically to feed.
The most common species are the Lesser Yellowlegs, Least Sandpiper, and Pectoral Sandpiper
2009) found evidence that phalaropes (a uniparental nester) suffered greater predation near human infrastructure in the Prudhoe Bay region, although pectoral sandpipers
, another uniparental shorebird, showed no effect.
July is usually a good month for a rare wader to appear and the month started with a pectoral sandpiper
at Inner Marsh Farm RSPB reserve, Wirral, on July 7 along with two green sandpipers and a long-staying spoonbill.
American golden-plovers, long-billed dowitchers, pectoral sandpipers
, and western sandpipers selected for salt marshes, although three of these species (long-billed dowitchers, pectoral sandpipers
, and western sandpipers) also selected for pond edge, which was often interspersed with salt marsh across our study site.
But at the weekend, autumn finally came calling in the shape of a fine pectoral sandpiper
, which appeared as I scanned the black-tailed godwit roost at Marshside, north of Southport.
Models and reality: Time-energy trade-offs in pectoral sandpiper
(Calidris melanotos) migration.
A variety of other Arctic breeders, such as the western sandpiper (Calidris mauri) and the pectoral sandpiper
Bar-tailed godwits, semipalmated sandpipers, pectoral sandpipers
, long-billed dowitchers, and red phalaropes occurred most frequently in the clusters in the west and decreased to the east.
Possibly there is a prevalence for ENE-E courses among pectoral sandpipers
(and partly also among grey phalaropes) and for ESE-SE courses among the other species.
Shorebirds breeding in the outer Mackenzie Delta include (in order of abundance) red-necked phalaropes, common snipe, semipalmated sandpipers, pectoral sandpipers
, stilt sandpipers, long-billed dowitchers, semipalmated plovers, lesser golden plovers, Hudsonian godwits, and whimbrel.