Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1971 0 1:15
1972 0 0:30
1974 3 6:30
1977 14 2:30
1982 0 1:50
1983 21 13:30
1984 40 12:30
1985 24 20:15
1986 0 2:00
1987 0 3:30
1988 0 3:15
1989 0 9:30
1990 0 0:00
1991 1 4:30
1992 20 3:00
1993 1 6:46
1994 1 1:00
1995 36 9:45
1996 4 5:15
1997 28 6:15
1998 0 6:30
1999 6 4:15
2000 10 8:45
2001 32 24:00
2002 7 11:30
2003 0 6:14
2004 36 52:15
2005 307 370:45
2006 562 560:00
2007 388 568:00
2008 491 623:30
2009 259 346:10
2010 245 257:51
2011 408 379:30
2012 461 474:30
2013 282 449:30
2014 306 366:57
2015 151 241:57
2016 55 386:02
2017 185 309:56
2018 265 319:16
2019 328 243:15
2020 62 129:30
 
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