{{tag>eu01539 old}}
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**Pibesvane/Sangsvane**  //Cygnus columbianus/C. cygnus//  

[[http://dofbasen.dk/search/result.php?design=table&soeg=soeg&periode=maanedaar&aar_first=1900&aar_second=1994&omraade=stor&stor=591&artdata=art&hiddenart=01539&subspecies=yes&obstype=observationer&species=alle&sortering=dato|DOFBasen:<1995]]