Mittelsäger (Mergus serrator) sind wie die anderen Säger-Arten faszinierende Wasservögel. Das Männchen kommt sehr bunt daher und im zeitigen Frühjahr ist die beeindruckende Balz mit ausgeprägtem Tauch- und Imponierverhalten zu bewundern. Dabei wird auch immer wieder der Schnabel in Szene gesetzt. Dabei lassen sich sehr gut die markanten und namensgebenden „Zähne“ erkennen.
Frankfurt Airport (FRA) is the gateway to continental Europe. Many airlines use the airport as a hub for connecting flights all over the world. If you have spare time between two flight and you are a birdwatcher, you might be interested to know, where you can find good sites to stretch your legs, enjoy fresh air and enjoy birding for typical european birds. One of these places – only 10 minutes away from the Frankfurt Airport – are the Langener Waldseen. These artificial lakes are situated just 2 km east of the runway and are a highly frequented recreation area with an oper-air swimming area. But wintertime is quiet and goods birds – including some vagrants – can be seen on the most western lake. This lake is still an active gravel spit, thus access especially for the best site is more or less tolerated and cannot be guaranteed.
Good birds to be seen on the lake in wintertime here on a regular basis are Canada Goose (Branta canadensis), Little Grebe (Tachybaptus ruficollis), Great Crested Grebe (Podiceps cristatus), Gadwall(Anas strepera), Common Pochard (Aythya ferina), Tufted Duck (Aythya fuligula) and Common Goldeneye (Bucephala clangula). At the beginning of December 2012 there was an influx of cold temperatures in Germany. Shortly after a Red-throated Loon (Gavia stellate), Smew (Mergellus albellus) , Common Merganser (Mergus merganser ) and a male Red-crested Pochard (Netta rufina) as well as up to 10 Velvet Scoter (Melanitta fusca) showed up. The woods hold all 6 species of continental woodpeckers (incl. Black, Middle-spotted and Grey-faced Woodpecker) and vast numbers of Hawfinch (Coccothraustes coccothraustes ) and Bramblings (Fringilla montifringilla) in the winter. Mistle Thrush (Turdus viscivorus) are often heard and sometimes seen in the canopy of the many pine trees. For the last winters 1 Great Grey (Northern) Shrike (Lanius excubitor) used the area as a wintering ground. I have seen large flocks of Common Crane moving overhead in late October from this site.