Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 836 143:25
1982 1691 100:04
1983 921 76:05
1984 4368 157:55
1985 2114 193:05
1986 3771 180:40
1987 1039 99:15
1988 1460 216:00
1989 4322 269:46
1990 1256 262:45
1991 2681 405:47
1992 10099 645:00
1993 10778 397:58
1994 9812 286:00
1995 9322 224:45
1996 3890 328:00
1997 8079 356:45
1998 21035 339:30
1999 6405 267:15
2000 5119 261:30
2001 6009 524:35
2002 4875 526:15
2003 16601 567:15
2004 27413 455:05
2005 18642 601:15
2006 6411 389:55
2007 6320 432:55
2008 13087 525:55
2009 10108 399:05
2010 11856 249:40
2011 25163 319:15
2012 9759 231:35
2013 26227 270:55
2014 6512 291:35
2015 3704 177:30
2016 6982 230:15
2017 9736 250:05
2018 7216 318:16
2019 19446 584:19
2020 12169 587:17
2021 21467 646:27
 
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