Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1983 67 9:15
1984 20 27:20
1985 93 29:00
1986 223 69:40
1987 95 47:00
1988 24 17:30
1989 75 45:00
1990 44 35:00
1991 4 48:28
1992 41 45:00
1993 564 51:30
1994 37 27:30
1995 30 50:00
1996 154 49:15
1997 66 34:50
1998 53 50:00
1999 195 57:20
2000 207 42:30
2001 147 69:35
2002 357 76:40
2003 170 108:30
2004 198 111:45
2005 435 145:21
2006 262 152:17
2007 874 187:59
2008 228 132:42
2009 186 75:32
2010 903 236:16
2011 839 281:19
2012 251 394:00
2013 149 408:08
2014 339 481:30
2015 1202 400:00
2016 259 467:00
2017 965 490:30
2018 2964 442:30
2019 4633 431:54
2020 2468 451:00
 
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