Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 2 5:30
1980 0 2:00
1981 2 143:25
1982 0 100:04
1983 0 76:05
1984 0 157:55
1985 0 193:05
1986 1 180:40
1987 11 99:15
1988 0 216:00
1989 9 269:46
1990 6 262:45
1991 0 405:47
1992 0 645:00
1993 9 397:58
1994 3 286:00
1995 6 224:45
1996 1 325:15
1997 6 356:45
1998 4 339:30
1999 1 267:15
2000 7 261:30
2001 16 524:35
2002 1 526:15
2003 10 567:15
2004 18 455:05
2005 9 601:15
2006 8 389:55
2007 1 432:55
2008 15 525:55
2009 2 399:05
2010 4 249:40
2011 12 319:15
2012 0 231:35
2013 1 270:55
2014 0 291:35
2015 0 177:30
2016 0 230:15
2017 0 250:05
2018 0 318:16
2019 2 584:19
2020 0 587:17
2021 1 539:42
 
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