Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 118 143:25
1982 146 100:04
1983 103 76:05
1984 100 157:55
1985 118 193:05
1986 145 180:40
1987 86 99:15
1988 52 216:00
1989 136 269:46
1990 112 262:45
1991 185 405:47
1992 86 645:00
1993 186 397:58
1994 69 286:00
1995 136 224:45
1996 148 325:15
1997 116 356:45
1998 103 339:30
1999 41 267:15
2000 59 261:30
2001 147 524:35
2002 221 526:15
2003 87 567:15
2004 78 455:05
2005 108 601:15
2006 39 389:55
2007 83 432:55
2008 105 525:55
2009 63 399:05
2010 29 249:40
2011 90 319:15
2012 45 231:35
2013 116 270:55
2014 78 291:35
2015 43 177:30
2016 37 230:15
2017 17 250:05
2018 91 318:16
2019 56 584:19
2020 81 587:17
2021 62 644:27
 
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