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 3 216:00
1989 0 269:46
1990 1 262:45
1991 0 405:47
1992 1 645:00
1993 1 397:58
1994 2 286:00
1995 0 224:45
1996 0 325:15
1997 5 356:45
1998 3 339:30
1999 3 267:15
2000 11 261:30
2001 4 524:35
2002 8 526:15
2003 0 567:15
2004 1 455:05
2005 1 601:15
2006 3 389:55
2007 0 432:55
2008 3 525:55
2009 1 399:05
2010 0 249:40
2011 0 319:15
2012 0 231:35
2013 2 270:55
2014 4 291:35
2015 1 177:30
2016 0 230:15
2017 0 250:05
2018 0 318:16
2019 6 584:19
2020 0 587:17
2021 1 539:42
 
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