Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 2 143:25
1982 1 100:04
1983 0 76:05
1984 0 157:55
1985 1 193:05
1986 3 180:40
1987 3 99:15
1988 5 216:00
1989 5 269:46
1990 7 262:45
1991 7 405:47
1992 5 645:00
1993 11 397:58
1994 11 286:00
1995 7 224:45
1996 13 325:15
1997 3 356:45
1998 8 339:30
1999 3 267:15
2000 17 261:30
2001 11 524:35
2002 6 526:15
2003 9 567:15
2004 19 455:05
2005 23 601:15
2006 13 389:55
2007 14 432:55
2008 29 525:55
2009 27 399:05
2010 10 249:40
2011 17 319:15
2012 14 231:35
2013 3 270:55
2014 20 291:35
2015 5 177:30
2016 34 230:15
2017 36 250:05
2018 14 318:16
2019 27 584:19
2020 13 587:17
2021 11 644:27
 
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