Migrations of Waders (Charadrii) in the Middle Odra Valley (W Poland)
Studies were conducted in 1994-2005, in the middle Odra valley (western Poland), between localities: Bytom Odrzański and Kunice (155 km). During research 1535 controls of different parts of valley were made. There were recorded 26 Charadrii species. Regular occurrence and migrations were observed only for a few of them: Little Ringed Plover (Charadrius dubius), Golden Plover (Pluvialis apricaria), Lapwing (Vanellus vanellus), Ruff (Philomachus pugnax), Common Snipe (Gallinago gallinago), Curlew (Numenius arquata), Redshank (Tringa totanus), Grenshank (T. nebularia), Green Sandpiper (T. ochropus), Wood Sandpiper (T. glareola) and Common Sandpiper (Actitis hypoleucos). There were a few observations of rare in Poland - Sociable Plover (Vanellus gregarius) - or usually uncommon inland species - Oystercatcher (Haematopus ostralegus), Great Snipe (Gallinago media), Bar-tailed Godwit (Limosa lapponica) and Whimbrel (Numenius phaeopus). Two features characterizing the waders' passages in the Lubusian part of Odra valley can be told. Firstly, the abundance of migrating birds is usually lower than in other areas, especially when comparing autumn numbers to big inland reservoirs and some ponds complexes. Secondly, the middle part of Odra valley plays more important role during spring than during autumn passage, especially for Lapwings and Golden Plovers.