Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
Favourites
Don't use roostmigration

Year Totals Observation hours
1983 0 9:15
1984 0 27:20
1985 4 29:00
1986 1020 69:40
1987 12 47:00
1988 0 17:30
1989 0 45:00
1990 4 35:30
1991 1 48:28
1992 4 45:00
1993 0 51:30
1994 9 27:30
1995 42 50:00
1996 20 49:15
1997 8 34:50
1998 2 50:00
1999 8 57:20
2000 5 42:30
2001 6 69:35
2002 6 76:40
2003 12 108:30
2004 6 111:45
2005 108 145:21
2006 19 152:17
2007 25 187:59
2008 158 132:42
2009 15 75:32
2010 80 236:16
2011 39 281:19
2012 37 394:00
2013 81 408:08
2014 16 481:30
2015 28 400:00
2016 33 467:00
2017 297 490:30
2018 3781 442:30
2019 76 431:54
2020 123 451:00
2021 28 382:00
2022 108 317:58
2023 0 180:00
 
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