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 0 100:04
1983 1 76:05
1984 4 157:55
1985 1 193:05
1986 1 180:40
1987 0 99:15
1988 9 216:00
1989 58 269:46
1990 64 262:45
1991 36 405:47
1992 41 645:00
1993 129 397:58
1994 101 286:00
1995 31 224:45
1996 118 325:15
1997 60 356:45
1998 123 339:30
1999 66 267:15
2000 29 261:30
2001 211 524:35
2002 54 526:15
2003 88 567:15
2004 45 455:05
2005 135 601:15
2006 35 389:55
2007 48 432:55
2008 27 525:55
2009 21 399:05
2010 54 249:40
2011 66 319:15
2012 21 231:35
2013 39 270:55
2014 57 291:35
2015 60 177:30
2016 25 230:15
2017 29 250:05
2018 20 318:16
2019 11 584:19
2020 38 587:17
2021 12 563:27
 
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