Summary Data on phenology and intra-seasonal population dynamics are described for 52 species of waterbirds resulting from ship-based visual surveys conducted from late June to October 2006 off the northeastern coast of Sakhalin Island, Russia. Estimates of population, age structure and polymorphic manifestations [...]
Summary Based on examinations of museum specimens (n = 320) and field descriptions of birds in nature (n = 487), the variability between Kamchatka Motacilla (alba) lugens and Spectacled M. alba ocularis white wagtail plumages were examined. Their populations are phenotypically variable, but [...]
Summary Steller’s sea eagle Haliaeetus pelagicus nest repair behavior is described based on observations made from 2007-2008 on north-eastern Sakhalin Island, Russia. Nest repair began in early March, immediately following the resident pair’s arrival from the wintering grounds, and took approximately three weeks [...]
Summary The Paradise flycatcher Terpsiphone paradise (Linnaeus, 1758) is a rare species locally distributed in the southwestern part of Ussuriland, mainly on the Khanka-Razdolnaya Plain. In spring it arrives in late May. The breeding season is stretched from the first ten days of [...]
Summary Different lengths of the 2nd and the 7th primary flight feathers in the Yellow-browed Warblers is one of the main distinguishing characteristics of their subspecies: Phylloscopus inornatus inornatus and Ph. i. humei. During the studies 1996—2000 and 2007 in different areas of central [...]