Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 2 143:25
1982 19 100:04
1983 0 76:05
1984 0 157:55
1985 0 193:05
1986 0 180:40
1987 5 99:15
1988 0 216:00
1989 14 269:46
1990 4 262:45
1991 9 405:47
1992 5 645:00
1993 22 397:58
1994 3 286:00
1995 6 224:45
1996 21 325:15
1997 6 356:45
1998 9 339:30
1999 13 267:15
2000 11 261:30
2001 23 524:35
2002 31 526:15
2003 12 567:15
2004 10 455:05
2005 3 601:15
2006 19 389:55
2007 31 432:55
2008 23 525:55
2009 47 399:05
2010 3 249:40
2011 16 319:15
2012 2 231:35
2013 9 270:55
2014 0 291:35
2015 8 177:30
2016 0 230:15
2017 0 250:05
2018 10 318:16
2019 2 584:19
2020 8 587:17
2021 4 644:27
 
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