TL;DR: Flight range estimates indicate that the smaller waders cannot fly the 4500-5500 km nonstop to east and south China, while the larger species can, on the condition that they experience tail wind assistance.
Abstract: Migratory activity of waders departing from north-western Australia in March-April 1991 was recorded by field observations and radar tracking. Field observations showed that the species concerned were mainly Bar-tailed Godwit Limosa lapponica, Grey Plover Pluvialis squatarola and Great Knot Calidris tenuirostris. Peak migration took place in the second week of April. Most flocks departed in the late afternoon, never at high tide. A strong correlation was found between the tidal cycle and the timing of departures. The majority of the flocks flew towards NNW. Given that the next stopover site of especially the larger sized waders is in east and south China (Barter & Wang 1990) this observed departure direction is more westerly than a course along the great circle route (0-degree). Wind patterns along two possible northward routes (a great circle and an island hopping route along the island-arc of South-east Asia) are analysed. In view of recoveries of waders ringed in Australia, especially the smaller waders (Mongolian Plover Charadrius mongolus, Large Sandplover Charadrius leschenaultii, Red-necked Stint Calidris ruficollis, Curlew Sandpiper Calidris ferruginea, Broad-billed Sandpiper Limicola falcinellus, Terek Sandpiper Xenus cinereus) may migrate via the island hopping route, while the larger ones (Grey Plover, Great Knot, Red Knot Calidris canutus, Bar-tailed Godwit, Whimbrel Numenius phaeopus and Eastern Curlew Numenius madagascariensis) take a direct, great circle flight to China. Considerable tail wind assistance can be gained during the northward trip, more so along the island arc than along the great circle. Flight range estimates indicate that the smaller waders cannot fly the 4500-5500 km nonstop to east and south China, while the larger species can, on the condition that they experience tail wind assistance.
TL;DR: A check list of South Georgia birds is presented in this article, giving details of all new records from 31 January 1977 to 30 April 1982, summarizing the status of many of the breeding species.
Abstract: A check list od South Georgia birds in presented, giving details of all new records from 31 January 1977 to 30 April 1982 an summarizingrevised information on the status of many of the breeding species. In this period, 22 visiting or vagrant species have been recorded, seven for the first time at South Georgia, including the first species of Palaecrctic origin, little stint an European house martin, and substantial numbers of cattle egrets. One new breeding species, fairy prion, was discovered. The total avifauna now consists of 30 breeding species an 36 visitors and vagrants.
TL;DR: No marked male Curlew Sandpiper or Little Stint were recorded in the season following the marking of Grey Plover and Knot, which is compatible with the nomadic behaviour of these two species.
Abstract: Summary Tomkovich, P.S. & Soloviev, M.Yu. 1994. Site fidelity in High Arctic breeding waders. Ostrich 65:174-180. The return rate and fluctuations in density between years were determined for colour-marked populations of Grey Plover Pluvialis squatarola. Little Stint Calidris minuta, Curlew Sandpiper C. ferruginea, Sanderling C. alba and Knot C. canutus in a study in the Knipovich Bay area, northern Taimyr, Central Siberia (76°05'N. 98°32'E) during three breeding seasons, June 1990 to August 1992. No birds marked as chick were recorded as returning to the study area. Females of all species exhibited low site fidelity. The return rate of males varied between species. No marked male Curlew Sandpiper or Little Stint were recorded in the season following the marking, which is compatible with the nomadic behaviour of these two species. In contrast, males of Grey Plover and Knot were site faithful and had return rates of 78% and 8% respectively (though the latter value may have been underestimated). Site fideli...
TL;DR: In this paper, a total of 126 surveys of waders (Charadrii) and other shorebirds were made along 4 km of shoreline northwest of Cape Recife.
Abstract: Summary Spearpoint, J. A., Every, B. & Underhill, L. G. 1988. Waders (Charadrii) and other shorebirds at Cape Recife, Algoa Bay, South Africa: seasonality, trends, conservation, and reliability of surveys. Ostrich 59: 166–177. A total of 126 surveys of waders (Charadrii) and other shorebirds were made along 4 km of shore northwest of Cape Recife. The surveys were conducted bv two observers who counted independently of each other. The variability between observers was least for conspicuous species such as Whitefronted Plover, Blacksmith Plover, African Black Oystercatcher, Whimbrel and Grey Plover, but greatest for cryptic species such as Ringed Plover and for species which formed a minority in mixed flocks such as Curlew Sandpiper and Little Stint. Variability of surveys within years and between years is also considered. Turnstones and Sanderlings were the most abundant waders in summer. Of the Palaearctic waders, Turnstones, Grey Plovers, Sanderlings, Greenshanks and Whimbrels overwintered. In contrast, ...
TL;DR: In this article, the authors presented the weights of four species of waders: Curlew Sandpiper, Little Stint, Ruff and Marsh Sandpicker, and reported that the great majority of the waders gained considerable weight before migration from the area in April and May.
Abstract: Summary
Palaearctic waders were caught and weighed at Lake Nakuru in the Kenyan rift valley on 22 occasions in the non-breeding season between March 1967 and May 1969 The weights of four species are presented:Curlew Sandpiper, Little Stint, Ruff and Marsh Sandpiper
Winter weights were relatively low and varied little It is thought that waders had very little fat reserve at this time
The mean weights of early autumn samples tended to be higher than corresponding mean winter weights, and autumn populations included some markedly heavy birds
An increase in the mean weight, and a dramatic rise in the maximum weights of each species occurred shortly before its main spring departure time The great majority of waders apparently gained considerable weight before migration from the area in April and May
The spring migration of waders from Kenya is briefly discussed