Tag: all of Calidris

Incubation capacity and clutch size determinationin two calidrine sandpipers: a test of the four-egg threshold

Semipalmated Sandpiper (Calidris pusilla) Science Article 3 abstract Several groups of vertebrate taxa, including shorebirds, are unusual in that they produce a x number of offspring. The aim of this study was to examine whether the incubation capacity of western sandpipers (Calidris mauri) and semipalmated sandpipers (C. pusilla) limits their maximum clutch size to four […]

Site Safety and Food Affect Movements of Semipalmated Sandpipers(Calidris pusilla) Migrating Through the Upper Bay of Fundy

Semipalmated Sandpiper (Calidris pusilla) Science Article 2 abstract The upper Bay of Fundy is a critical stopover site for Semipalmated Sandpipers (Calidrispusilla) during their fall migration. However, little is known about factors that influence selection of feeding and roosting sites by these birds, or the extent to which birds move between different sites during their […]

The structure of aerial displays in three species of calidridinae (scolopacidae)

Semipalmated Sandpiper (Calidris pusilla) Science Article 1 abstract Sandpipers in the subfamily Calidridinae (Scolopacidae) breed in the Arctic and Subarctic. In all species, unpaired males engage in distinctive aerial displays. Such displays are described for three species: Dunlin (Calidris alpina L.), Semipalmated Sandpiper (Calidris pusilla L.), and Stilt Sandpiper(Calidris himantopus Bonaparte). EDWARD H. MILLER, The […]

Breeding Flight Display in the Female White-rumped Sandpiper

White-rumped Sandpiper (Calidris fuscicollis) Science Article 1 abstract Independent female aerial display or female participation in the aerial display of the male is virtually unreported. I present here my observations of an incident of female participation in the aerial flight display of the White-rumped Sandpiper (Calidris fuscicollis) at Barrow, Alaska. Brian J. McCaffery, Auk, volume […]

Migration and morphometrics of Temminck’s StintCalidris temminckii at Ottenby, southern Sweden

Temmincks Stint (Calidris temminckii) Science Article 1 abstract Data are reported from 55 years of ringing and observation on the migration of Temminck’s Stint Calidristemminckii at Ottenby Bird Observatory, Sweden. Numbers ringed have declined since the 1940s due tohigh numbers caught in 1948 and 1949. Thereafter there is no clear trend. The overall autumn migrationdirection […]

Spring migration of Sanderlings Calidris alba through SW Iceland: Wherefrom and whereto?

Sanderling (Calidris alba) Science Article 2 abstract The spring migration of Sanderlings Calidris alba through southwest Iceland was studied in 1989-1990. Additional information was collected during the spring seasons of 1985-88 and 1991. Ringing recoveries and controls, together with a large number of sightings of color-ringed birds, revealed that many Sanderlings staging in Iceland in […]

Arrival and weight gain of Red Knot Calidris canutus, Ruddy Turnstone Arenaria interpresand Sanderling Calidris alba staging in Delaware Bay in spring

Sanderling (Calidris alba) Science Article 3 abstract Delaware Bay is an important spring staging area for shorebirds migrating north along the easternAmerican coast, with birds relying heavily on Horseshoe Crab Limulus polyphemus eggs duringtheir stay. While many species use the Bay, three species are of particular interest: Red KnotCalidris canutus, Ruddy Turnstone Arenaria interpres and […]

Sanderlings (Calidris alba) have a magnetic compass: orientation experiments during spring migration in Iceland

Sanderling (Calidris alba) Science Article 1 abstract The migratory orientation of sanderlings (Calidris alba) was investigated with cage experiments during the spring migration in southwest Iceland. Sanderlings were exposed to 90 deg counterclockwise-shifted magnetic fields under both clear skies and natural overcast. Clear sky control tests resulted in a northerly mean direction, in agreement with […]

Digestive bottleneck affects foraging decisions in red knots Calidris canutus. II. Patch choice and length of working day

Red Knot (Calidris canutus) Science Article 15 abstract When prey occur at high densities, energy assimilation rates are generally constrained by rates of digestion rather than by rates of collection (i.e. search and handle). As predators usually select patches containing high prey densities, rates of digestion will play an important role in the foraging ecology […]