Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1983 2 9:15
1984 90 27:20
1985 97 29:00
1986 157 69:40
1987 194 47:00
1988 34 17:30
1989 90 45:00
1990 232 35:00
1991 97 48:28
1992 37 45:00
1993 157 51:30
1994 12 27:30
1995 81 50:00
1996 76 49:15
1997 19 34:50
1998 41 50:00
1999 101 57:20
2000 84 42:30
2001 209 69:35
2002 82 76:40
2003 142 108:30
2004 61 111:45
2005 114 145:21
2006 254 152:17
2007 163 187:59
2008 247 132:42
2009 88 75:32
2010 405 236:16
2011 514 281:19
2012 548 394:00
2013 274 408:08
2014 701 481:30
2015 286 400:00
2016 527 467:00
2017 494 490:30
2018 488 442:30
2019 879 431:54
2020 851 374:00
 
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