Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 1 143:25
1982 2 100:04
1983 0 76:05
1984 2 157:55
1985 0 193:05
1986 0 180:40
1987 0 99:15
1988 1 216:00
1989 6 269:46
1990 2 262:45
1991 2 405:47
1992 6 645:00
1993 10 397:58
1994 7 286:00
1995 5 224:45
1996 13 325:15
1997 24 356:45
1998 8 339:30
1999 12 267:15
2000 3 261:30
2001 38 524:35
2002 20 526:15
2003 52 567:15
2004 26 455:05
2005 43 601:15
2006 11 389:55
2007 19 432:55
2008 77 525:55
2009 54 399:05
2010 34 249:40
2011 51 319:15
2012 46 231:35
2013 61 270:55
2014 25 291:35
2015 16 177:30
2016 32 230:15
2017 9 250:05
2018 39 318:16
2019 31 584:19
2020 56 587:17
2021 52 646:27
 
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