Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 11 143:25
1982 31 100:04
1983 51 76:05
1984 29 157:55
1985 29 193:05
1986 69 180:40
1987 17 99:15
1988 0 216:00
1989 6 269:46
1990 1 262:45
1991 13 405:47
1992 5 645:00
1993 17 397:58
1994 12 286:00
1995 15 224:45
1996 5 325:15
1997 2 356:45
1998 1 339:30
1999 0 267:15
2000 0 261:30
2001 2 524:35
2002 1 526:15
2003 9 567:15
2004 2 455:05
2005 0 601:15
2006 1 389:55
2007 0 432:55
2008 0 525:55
2009 0 399:05
2010 0 249:40
2011 2 319:15
2012 0 231:35
2013 1 270:55
2014 0 291:35
2015 0 177:30
2016 0 230:15
2017 0 250:05
2018 2 318:16
2019 2 584:19
2020 1 587:17
2021 1 644:27
 
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