Observations of Slender-billed Curlews on Atanasov lake in Bulgaria, April-May 1996. - D. Nankinov, S. Kirilov, K. Popov, N. Dimitrov, A. Dimov. - Berkut. 7 (1-2). 1998. - P. 48-49.
A mixed flock of Slender-billed Curlews and Whimblels was observed on the Atanasov Lake each day since 11 till 19.04.1996. Number of Slender-billed Curlews varied from 4 to 9 individuals (2 young birds). Birds were very timorous. The minimal flight distance was 80-100 m. Differences between two species are discussed. [German].
Key words: Bulgaria, Slender-billed Curlew, Numenius tenuirostris, migration, behaviour, conservation.
D.N. Nankinov, Institut of Zoology, Boul. Tsar Osvoboditel 1, 1000 Sofia, Bulgaria.