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 0 157:55
1985 0 193:05
1986 0 180:40
1987 0 99:15
1988 0 216:00
1989 21 269:46
1990 10 262:45
1991 0 405:47
1992 0 645:00
1993 1 397:58
1994 3 286:00
1995 2 224:45
1996 0 325:15
1997 20 356:45
1998 7 339:30
1999 0 267:15
2000 1 261:30
2001 0 524:35
2002 108 526:15
2003 1329 567:15
2004 36 455:05
2005 73 601:15
2006 7 389:55
2007 640 432:55
2008 501 525:55
2009 116 399:05
2010 6 249:40
2011 12 319:15
2012 0 231:35
2013 15 270:55
2014 14 291:35
2015 0 177:30
2016 8 230:15
2017 6 250:05
2018 10 318:16
2019 10 584:19
2020 1 587:17
2021 152 539:42
 
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