Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 27 143:25
1982 16 100:04
1983 8 76:05
1984 31 157:55
1985 48 193:05
1986 35 180:40
1987 43 99:15
1988 44 216:00
1989 140 269:46
1990 362 262:45
1991 123 405:47
1992 187 645:00
1993 191 397:58
1994 320 286:00
1995 106 224:45
1996 110 325:15
1997 129 356:45
1998 155 339:30
1999 107 267:15
2000 119 261:30
2001 183 524:35
2002 113 526:15
2003 132 567:15
2004 201 455:05
2005 264 601:15
2006 168 389:55
2007 249 432:55
2008 555 525:55
2009 267 399:05
2010 109 249:40
2011 408 319:15
2012 189 231:35
2013 116 270:55
2014 123 291:35
2015 47 177:30
2016 221 230:15
2017 249 250:05
2018 90 318:16
2019 339 584:19
2020 464 587:17
2021 113 539:42
 
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