Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 0 143:25
1982 0 100:04
1983 0 76:05
1984 1 157:55
1985 1 193:05
1986 0 180:40
1987 0 99:15
1988 3 216:00
1989 0 269:46
1990 2 262:45
1991 2 405:47
1992 7 645:00
1993 10 397:58
1994 5 286:00
1995 8 224:45
1996 8 325:15
1997 4 356:45
1998 8 339:30
1999 6 267:15
2000 7 261:30
2001 20 524:35
2002 3 526:15
2003 4 567:15
2004 3 455:05
2005 12 601:15
2006 4 389:55
2007 2 432:55
2008 22 525:55
2009 10 399:05
2010 4 249:40
2011 11 319:15
2012 1 231:35
2013 9 270:55
2014 9 291:35
2015 2 177:30
2016 13 230:15
2017 18 250:05
2018 12 318:16
2019 16 584:19
2020 12 587:17
2021 13 644:27
 
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