Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 106 5:30
1980 19 2:00
1981 20527 143:25
1982 4555 100:04
1983 2647 76:05
1984 9766 157:55
1985 9418 193:05
1986 11724 180:40
1987 5966 99:15
1988 56764 216:00
1989 15313 269:46
1990 15714 262:45
1991 20928 405:47
1992 45019 645:00
1993 34142 397:58
1994 24110 286:00
1995 21337 224:45
1996 20100 325:15
1997 24284 356:45
1998 60856 339:30
1999 20851 267:15
2000 24808 261:30
2001 26865 524:35
2002 31106 526:15
2003 25048 567:15
2004 34412 455:05
2005 40619 601:15
2006 48773 389:55
2007 37938 432:55
2008 105672 525:55
2009 44064 399:05
2010 16026 249:40
2011 47800 319:15
2012 54015 231:35
2013 18643 270:55
2014 20855 291:35
2015 9755 177:30
2016 27515 230:15
2017 77261 250:05
2018 22877 318:16
2019 48586 584:19
2020 37063 587:17
2021 39825 539:42
 
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