File:Dansk ornithologisk forenings tidsskrift (1921) (20650640889).jpg

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Title: Dansk ornithologisk forenings tidsskrift
Identifier: danskornithologi15dans (find matches)
Year: 1907 (1900s)
Authors: Dansk ornitologisk forening
Subjects: Birds -- Periodicals; Birds -- Denmark Periodicals
Publisher: (Kavn) : Den Forening
Contributing Library: American Museum of Natural History Library
Digitizing Sponsor: Biodiversity Heritage Library

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Dansk: H. CHR. C. MORTENSEN 27. AUG. 1856 — 7. JUNI 1921 Tanken om at skaffe Klarhed over, hvor Trækfuglene drog hen om Vinteren, og hvilken Vej de fulgte, har altid beskæftiget Ornithologerne. En Del af de Spørgsmaal, der knytter sig hertil, kan løses ved den af Mortensen angivne Ringmærkning, og nogle af dem er allerede løste af ham selv og andre, der har fulgt hans Anvisninger. Intet Under at næppe nogen dansk Ornitho- logs Navn i Udlandet havde den Klang som Mortensens. Spørgsmaalet om at mærke Trækfuglene paa en eller anden Maade og derved udforske deres Rejsers Vej og Maal var i og for sig gammelt, men oftest var det blevet ved Tanken eller højst ved enkelte, ret naive og upraktiske Forsøg. Mortensens Fortjeneste er, at han førte Tanken ud i Praksis; han mærkede et stort Antal Fugle om Foden med en Aluminiumring stemplet med hans Adresse, slap derpaa Fuglene løs og søgte at faa de saa- ledes mærkede Fugle tilbage. Det sidste opnaaede han dels ved at gøre sine Forsøg bekendte i ornithologiske og andre Tids- skrifter, dels gennem Dagspressen rundt om i Verden. I 1899 begyndte hans Ringmærkningsforsøg, og han fortsatte dem uaf- brudt til sin Død. Selv naaede han med Assistance af en Del andre Ornithologer her i Landet at faa mærket ialt (5000 Fugle; hvad der efter hans Metode er mærket i Udlandet, løber vist op over 100,000. De ydre Rammer i hans Liv er snart givne: Hans Christian Cornelius Mortensen var født paa Jonstrup den 27. August 1856, hvor hans Fader, den bekendte Botaniker Hans Mortensen,


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