Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
Favourites

Year Totals Observation hours
1983 1010 9:15
1984 1160 27:20
1985 3277 29:00
1986 4684 69:40
1987 2684 47:00
1988 175 17:30
1989 7415 45:00
1990 9707 35:30
1991 1655 48:28
1992 9792 45:00
1993 7141 51:30
1994 1615 27:30
1995 1829 50:00
1996 1797 49:15
1997 1452 34:50
1998 3969 50:00
1999 2552 57:20
2000 3856 42:30
2001 12128 69:35
2002 4806 76:40
2003 3611 108:30
2004 5207 111:45
2005 8252 145:21
2006 7705 152:17
2007 12216 187:59
2008 9121 132:42
2009 10084 75:32
2010 14158 236:16
2011 16161 281:19
2012 26896 394:00
2013 26413 408:08
2014 24145 481:30
2015 48622 400:00
2016 20127 467:00
2017 27681 490:30
2018 79981 442:30
2019 105484 431:54
2020 44657 451:00
2021 16697 315:30
 
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