Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1971 77 1:15
1972 91 0:30
1974 229 6:30
1977 185 2:30
1982 90 1:50
1983 1531 13:30
1984 513 12:30
1985 1205 20:15
1986 0 2:00
1987 7 3:30
1988 1 3:15
1989 34 9:30
1990 0 0:00
1991 4000 4:30
1992 10 3:00
1993 57 6:46
1994 20 1:00
1995 804 9:45
1996 2026 5:15
1997 3095 6:15
1998 100 6:30
1999 300 4:15
2000 530 8:45
2001 5630 24:00
2002 1465 11:30
2003 55 6:14
2004 917 52:15
2005 22531 370:45
2006 15174 560:00
2007 8324 568:00
2008 21190 623:30
2009 12583 346:10
2010 6556 257:51
2011 33388 379:30
2012 16549 474:30
2013 21144 449:30
2014 23714 366:57
2015 6009 241:57
2016 12538 386:02
2017 17029 309:56
2018 11254 319:16
2019 45183 243:15
2020 0 39:45
 
Partners