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 1 180:40
1987 0 99:15
1988 0 216:00
1989 0 269:46
1990 1 262:45
1991 5 405:47
1992 3 645:00
1993 3 397:58
1994 4 286:00
1995 1 224:45
1996 8 325:15
1997 0 356:45
1998 0 339:30
1999 4 267:15
2000 0 261:30
2001 3 524:35
2002 3 526:15
2003 6 567:15
2004 8 455:05
2005 3 601:15
2006 2 389:55
2007 7 432:55
2008 2 525:55
2009 7 399:05
2010 8 249:40
2011 9 319:15
2012 1 231:35
2013 8 270:55
2014 3 291:35
2015 0 177:30
2016 4 230:15
2017 0 250:05
2018 3 318:16
2019 18 584:19
2020 11 587:17
2021 2 569:27
 
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