Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 10 143:25
1982 0 100:04
1983 0 76:05
1984 0 157:55
1985 0 193:05
1986 1 180:40
1987 0 99:15
1988 0 216:00
1989 4 269:46
1990 2 262:45
1991 3 405:47
1992 28 645:00
1993 116 397:58
1994 7 286:00
1995 22 224:45
1996 3 325:15
1997 30 356:45
1998 84 339:30
1999 34 267:15
2000 67 261:30
2001 96 524:35
2002 39 526:15
2003 17 567:15
2004 20 455:05
2005 15 601:15
2006 10 389:55
2007 3 432:55
2008 17 525:55
2009 0 399:05
2010 4 249:40
2011 21 319:15
2012 6 231:35
2013 2 270:55
2014 8 291:35
2015 4 177:30
2016 8 230:15
2017 15 250:05
2018 26 318:16
2019 4 584:19
2020 18 587:17
2021 20 644:27
 
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