Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 18 2:00
1981 63 143:25
1982 0 100:04
1983 0 76:05
1984 0 157:55
1985 0 193:05
1986 4 180:40
1987 7 99:15
1988 3 216:00
1989 27 269:46
1990 60 262:45
1991 76 405:47
1992 184 645:00
1993 188 397:58
1994 94 286:00
1995 31 224:45
1996 149 325:15
1997 39 356:45
1998 83 339:30
1999 91 267:15
2000 77 261:30
2001 89 524:35
2002 101 526:15
2003 136 567:15
2004 155 455:05
2005 281 601:15
2006 101 389:55
2007 87 432:55
2008 53 525:55
2009 55 399:05
2010 111 249:40
2011 62 319:15
2012 73 231:35
2013 80 270:55
2014 23 291:35
2015 31 177:30
2016 33 230:15
2017 35 250:05
2018 42 318:16
2019 142 584:19
2020 308 587:17
2021 616 646:27
 
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