Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 15 143:25
1982 5 100:04
1983 1 76:05
1984 0 157:55
1985 0 193:05
1986 1 180:40
1987 0 99:15
1988 0 216:00
1989 10 269:46
1990 3 262:45
1991 6 405:47
1992 7 645:00
1993 5 397:58
1994 2 286:00
1995 4 224:45
1996 7 325:15
1997 8 356:45
1998 5 339:30
1999 11 267:15
2000 8 261:30
2001 51 524:35
2002 30 526:15
2003 34 567:15
2004 38 455:05
2005 34 601:15
2006 11 389:55
2007 23 432:55
2008 40 525:55
2009 25 399:05
2010 51 249:40
2011 44 319:15
2012 21 231:35
2013 569 270:55
2014 7 291:35
2015 12 177:30
2016 16 230:15
2017 22 250:05
2018 43 318:16
2019 16 584:19
2020 87 587:17
2021 26 539:42
 
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