Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 10 5:30
1980 13 2:00
1981 6649 143:25
1982 3151 100:04
1983 2134 76:05
1984 6163 157:55
1985 2719 193:05
1986 4558 180:40
1987 1206 99:15
1988 4566 216:00
1989 7436 269:46
1990 6338 262:45
1991 14461 405:47
1992 18004 645:00
1993 11687 397:58
1994 8880 286:00
1995 3490 224:45
1996 16222 325:15
1997 13056 356:45
1998 12887 339:30
1999 5762 267:15
2000 6586 261:30
2001 9448 524:35
2002 12454 526:15
2003 8480 567:15
2004 10486 455:05
2005 13594 601:15
2006 2971 389:55
2007 6302 432:55
2008 9636 525:55
2009 8727 399:05
2010 5874 249:40
2011 5474 319:15
2012 5133 231:35
2013 6915 270:55
2014 5143 291:35
2015 3860 177:30
2016 4527 230:15
2017 2473 250:05
2018 6453 318:16
2019 10450 584:19
2020 12067 587:17
2021 4919 644:27
 
Partners