Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1971 0 1:15
1972 0 0:30
1974 6 6:30
1977 3 2:30
1982 0 1:50
1983 1 13:30
1984 15 12:30
1985 2 20:15
1986 0 2:00
1987 1 3:30
1988 0 3:15
1989 15 9:30
1990 0 0:00
1991 0 4:30
1992 0 3:00
1993 0 6:46
1994 0 1:00
1995 0 9:45
1996 0 5:15
1997 0 6:15
1998 0 6:30
1999 0 4:15
2000 15 8:45
2001 6 24:00
2002 0 11:30
2003 0 6:14
2004 10 52:15
2005 190 370:45
2006 524 560:00
2007 144 568:00
2008 164 623:30
2009 190 346:10
2010 65 257:51
2011 144 379:30
2012 87 474:30
2013 68 449:30
2014 127 366:57
2015 34 241:57
2016 23 386:02
2017 78 309:56
2018 72 319:16
2019 47 243:15
2020 0 14:00
 
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