Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 1 5:30
1980 2 2:00
1981 2 143:25
1982 0 100:04
1983 2 76:05
1984 2 157:55
1985 0 193:05
1986 0 180:40
1987 4 99:15
1988 4 216:00
1989 9 269:46
1990 15 262:45
1991 6 405:47
1992 26 645:00
1993 20 397:58
1994 38 286:00
1995 3 224:45
1996 14 325:15
1997 10 356:45
1998 9 339:30
1999 19 267:15
2000 5 261:30
2001 15 524:35
2002 11 526:15
2003 8 567:15
2004 14 455:05
2005 24 601:15
2006 8 389:55
2007 4 432:55
2008 17 525:55
2009 7 399:05
2010 8 249:40
2011 18 319:15
2012 7 231:35
2013 5 270:55
2014 4 291:35
2015 2 177:30
2016 1 230:15
2017 3 250:05
2018 2 318:16
2019 9 584:19
2020 3 587:17
2021 1 524:47
 
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