Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 3 5:30
1980 0 2:00
1981 61 143:25
1982 14 100:04
1983 17 76:05
1984 15 157:55
1985 15 193:05
1986 7 180:40
1987 1 99:15
1988 14 216:00
1989 11 269:46
1990 14 262:45
1991 13 405:47
1992 20 645:00
1993 39 397:58
1994 34 286:00
1995 31 224:45
1996 21 325:15
1997 27 356:45
1998 18 339:30
1999 4 267:15
2000 21 261:30
2001 17 524:35
2002 10 526:15
2003 7 567:15
2004 8 455:05
2005 19 601:15
2006 11 389:55
2007 1 432:55
2008 6 525:55
2009 6 399:05
2010 2 249:40
2011 1 319:15
2012 2 231:35
2013 2 270:55
2014 3 291:35
2015 2 177:30
2016 1 230:15
2017 1 250:05
2018 5 318:16
2019 11 584:19
2020 5 587:17
2021 4 550:12
 
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