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 2 100:04
1983 0 76:05
1984 2 157:55
1985 1 193:05
1986 2 180:40
1987 1 99:15
1988 0 216:00
1989 0 269:46
1990 2 262:45
1991 2 405:47
1992 4 645:00
1993 0 397:58
1994 1 286:00
1995 7 224:45
1996 2 325:15
1997 11 356:45
1998 4 339:30
1999 7 267:15
2000 5 261:30
2001 5 524:35
2002 10 526:15
2003 16 567:15
2004 8 455:05
2005 2 601:15
2006 1 389:55
2007 2 432:55
2008 13 525:55
2009 3 399:05
2010 4 249:40
2011 14 319:15
2012 6 231:35
2013 4 270:55
2014 6 291:35
2015 0 177:30
2016 6 230:15
2017 4 250:05
2018 6 318:16
2019 10 584:19
2020 4 587:17
2021 4 646:27
 
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