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 0 180:40
1987 0 99:15
1988 9 216:00
1989 12 269:46
1990 3 262:45
1991 0 405:47
1992 6 645:00
1993 11 397:58
1994 2 286:00
1995 4 224:45
1996 8 325:15
1997 0 356:45
1998 2 339:30
1999 1 267:15
2000 0 261:30
2001 4 524:35
2002 1 526:15
2003 0 567:15
2004 0 455:05
2005 20 601:15
2006 5 389:55
2007 0 432:55
2008 5 525:55
2009 3 399:05
2010 9 249:40
2011 4 319:15
2012 9 231:35
2013 5 270:55
2014 0 291:35
2015 0 177:30
2016 40 230:15
2017 16 250:05
2018 15 318:16
2019 21 584:19
2020 7 587:17
2021 6 646:27
 
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