A ruff is seen at the bank of the Pripiat river, in the town of Turov, some 270 km (167 miles) south of Minsk, May 6, 2012. Researchers from the Belarussian Academy of Sciences ring birds at the floodplain of the southern river to monitor their migratory routes from South to North-East every spring. REUTERS/Vasily Fedosenko (BELARUS - Tags: ANIMALS ENVIRONMENT)