Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 10 143:25
1982 4 100:04
1983 0 76:05
1984 5 157:55
1985 12 193:05
1986 35 180:40
1987 4 99:15
1988 58 216:00
1989 31 269:46
1990 34 262:45
1991 14 405:47
1992 7 645:00
1993 35 397:58
1994 67 286:00
1995 28 224:45
1996 25 328:00
1997 34 356:45
1998 78 339:30
1999 38 267:15
2000 56 261:30
2001 114 524:35
2002 31 526:15
2003 39 567:15
2004 87 455:05
2005 45 601:15
2006 58 389:55
2007 148 432:55
2008 128 525:55
2009 62 399:05
2010 38 249:40
2011 155 319:15
2012 74 231:35
2013 19 270:55
2014 87 291:35
2015 26 177:30
2016 125 230:15
2017 114 250:05
2018 93 318:16
2019 168 584:19
2020 413 587:17
2021 87 646:27
2022 137 442:55
 
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