Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 1 143:25
1982 6 100:04
1983 3 76:05
1984 2 157:55
1985 1 193:05
1986 3 180:40
1987 2 99:15
1988 7 216:00
1989 15 269:46
1990 17 262:45
1991 6 405:47
1992 8 645:00
1993 10 397:58
1994 17 286:00
1995 11 224:45
1996 2 325:15
1997 8 356:45
1998 9 339:30
1999 3 267:15
2000 13 261:30
2001 22 524:35
2002 2 526:15
2003 10 567:15
2004 10 455:05
2005 14 601:15
2006 10 389:55
2007 11 432:55
2008 18 525:55
2009 5 399:05
2010 5 249:40
2011 15 319:15
2012 4 231:35
2013 3 270:55
2014 2 291:35
2015 0 177:30
2016 6 230:15
2017 7 250:05
2018 3 318:16
2019 6 584:19
2020 4 587:17
2021 2 539:42
 
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