Biometrics and breeding phenology of Terek Sandpipers in the Pripyat’ Valley, S Belarus
54 – 58
1 August 06
Natalia Karlionova, Magdalena Remisiewicz, Pavel Pinchuk
Institute of Zoology, Belarussian National Academy of Sciences, Academichnaya Str. 27, 220072 Minsk, Belarus.
We present data on the breeding phenology and biometrics of Terek Sandpipers from the isolated westernmost population in the Pripyat’ river valley, S Belarus, close to the border with Ukraine. Studies were conducted on floodplain islands between the beginning of April and mid-July during 1996–1999 and 2002–2006. Over the years, the first arrivals appeared during 10–26 April (median 14 April), first eggs were laid during 24 April to 5 May (median 30 April) and the latest egg was laid on 25 May, first chicks hatched during 19 May to 1 June (median 25 May) and the first fledged juveniles were caught on 23 June. We present biometric data for juveniles (at the post-fledging stage) and adults. The mean wing length of juveniles, just before departure from the breeding grounds in mid June, reached 96% of that of adults. Juvenile total head lengths were 91% of adult, and bill and nalospi lengths 85% of adult, but tarsus and tarsus plus toe lengths were the same as adults. On average, juveniles left the breeding grounds about 11 g heavier than adults, which had a departure mass near the lowest known for the species.