Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 0 143:25
1982 1 100:04
1983 2 76:05
1984 0 157:55
1985 0 193:05
1986 3 180:40
1987 1 99:15
1988 8 216:00
1989 50 269:46
1990 44 262:45
1991 2 405:47
1992 6 645:00
1993 114 397:58
1994 6 286:00
1995 51 224:45
1996 10 325:15
1997 403 356:45
1998 56 339:30
1999 6 267:15
2000 8 261:30
2001 11 524:35
2002 50 526:15
2003 892 567:15
2004 78 455:05
2005 127 601:15
2006 88 389:55
2007 3780 432:55
2008 230 525:55
2009 1298 399:05
2010 53 249:40
2011 1220 319:15
2012 54 231:35
2013 778 270:55
2014 27 291:35
2015 47 177:30
2016 35 230:15
2017 8 250:05
2018 71 318:16
2019 1307 584:19
2020 344 587:17
2021 277 563:27
 
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