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 2 2:30
1982 3 1:50
1983 0 13:30
1984 0 12:30
1985 4 20:15
1986 0 2:00
1987 1 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 1 6:15
1998 1 6:30
1999 4 4:15
2000 5 8:45
2001 12 24:00
2002 5 11:30
2003 0 6:14
2004 2 52:15
2005 136 370:45
2006 114 560:00
2007 102 568:00
2008 216 623:30
2009 90 346:10
2010 169 257:51
2011 324 379:30
2012 228 474:30
2013 271 449:30
2014 390 366:57
2015 294 241:57
2016 212 386:02
2017 411 309:56
2018 612 319:16
2019 151 243:15
2020 136 121:00
 
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