Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 12 143:25
1982 5 100:04
1983 0 76:05
1984 6 157:55
1985 0 193:05
1986 0 180:40
1987 0 99:15
1988 20 216:00
1989 17 269:46
1990 15 262:45
1991 24 405:47
1992 17 645:00
1993 19 397:58
1994 7 286:00
1995 1 224:45
1996 11 325:15
1997 5 356:45
1998 5 339:30
1999 5 267:15
2000 6 261:30
2001 6 524:35
2002 7 526:15
2003 7 567:15
2004 8 455:05
2005 8 601:15
2006 6 389:55
2007 7 432:55
2008 4 525:55
2009 2 399:05
2010 2 249:40
2011 1 319:15
2012 0 231:35
2013 10 270:55
2014 15 291:35
2015 3 177:30
2016 13 230:15
2017 27 250:05
2018 25 318:16
2019 21 584:19
2020 19 587:17
2021 13 646:27
 
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