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Article
Peter Koehler, Auteur ; Ursula Koehler, AuteurAn adult female Tufted Duck was captured flightless November 22nd, 2005, at the RAMSAR-site "Ismaninger Speichersee mit Fischteichen", near Munich, Upper Bavaria, Southern Germany. Both primaries 10 and the right-side P 9 were old/retained, the [...]
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Peter Koehler, Auteur ; Eberhard von Krosigk, AuteurA moult migration in Ferruginous Ducks is described for the first time. The tradition to moult off the breeding grounds began in 1956 in the Ramsar site "Ismaninger Speichersee mit Fischteichen", near to Munich, Upper Bavaria. This development c[...]
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Peter Koehler, Auteur ; Ursula Koehler, Auteur
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Peter Koehler, Auteur ; Ursula Koehler, Auteur ; Eberhard von Krosigk, Auteur ; Burkhard Hense, AuteurFor more than fifty years, Ferruginous Ducks have migrated to this Ramsar site near Munich, Upper Bavaria, Germany, to moult flight-feathers between July and September. From 2003 to 2007, counts averaged twelve (six to twenty five) moulting bird[...]
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Ursula Koehler, Auteur ; Peter Koehler, Auteur ; Ursula Firsching, Auteur ; Eberhard von Krosigk, AuteurA significant reduction of nutrients in the waters of the Ramsar-site "Ismaninger Speichersee mit Fischteichen" caused a reduced production of food for the waterfowl populations moulting there. Since 1994, some species decreased dramatically, ma[...]
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Eberhard von Krosigk, Auteur ; Peter Koehler, AuteurFollowing a significant reduction of nutrients, the trophic state of the Ramsar site "Ismaninger Speichersee mit Fischteichen" turned between 1988 and 1999 from polytrophic to eutrophic in the reservoir and from hypertrophic to polytrophic in th[...]
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Ursula Koehler, Auteur ; Peter Koehler, AuteurMeeting criteria 4, 5, and 6 of the Ramsar Convention, "Ismaninger Speichersee mit Fischteichen", a reservoir with adjacent ponds, Southern Germany, Continues to be a wetland of international importance. In the years 2002-2008, the site supporte[...]
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Tim Cleeves, Auteur ; Nicola Crockford, Auteur ; Peter Koehler, AuteurWe trust that this article provides the basic information to arm those who seek to follow the quest to find the Slender-billed Curlew. We have suggested where and when the birds are most likely to found, including giving relevant clues regarding[...]
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Andrea Gehrold, Auteur ; Peter Koehler, AuteurWing moult is a critical period within the annual cycle of birds, particularly in waterbirds which become completely flightless. The inherent vulnerability to anthropogenic disturbance, predation and decreasing habitat quality often results in r[...]
