Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1971 0 1:15
1972 0 0:30
1974 0 6:30
1977 0 2:30
1982 0 1:50
1983 0 13:30
1984 0 12:30
1985 0 20:15
1986 0 2:00
1987 0 3:30
1988 0 3:15
1989 0 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 1 6:30
1999 1 4:15
2000 0 8:45
2001 0 24:00
2002 1 11:30
2003 0 6:14
2004 5 52:15
2005 32 370:45
2006 89 560:00
2007 151 568:00
2008 150 623:30
2009 44 346:10
2010 43 257:51
2011 27 379:30
2012 20 474:30
2013 22 449:30
2014 31 366:57
2015 20 241:57
2016 39 386:02
2017 11 309:56
2018 5 319:16
2019 10 243:15
2020 20 142:55
 
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