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 0 100:04
1983 32 76:05
1984 0 157:55
1985 5 193:05
1986 17 180:40
1987 3 99:15
1988 10 216:00
1989 40 269:46
1990 9 262:45
1991 162 405:47
1992 105 645:00
1993 47 397:58
1994 249 286:00
1995 68 224:45
1996 549 325:15
1997 38 356:45
1998 20 339:30
1999 57 267:15
2000 58 261:30
2001 382 524:35
2002 43 526:15
2003 1313 567:15
2004 565 455:05
2005 2848 601:15
2006 261 389:55
2007 124 432:55
2008 213 525:55
2009 159 399:05
2010 884 249:40
2011 168 319:15
2012 32 231:35
2013 41 270:55
2014 12 291:35
2015 10 177:30
2016 26 230:15
2017 121 250:05
2018 79 318:16
2019 366 584:19
2020 56 587:17
2021 114 644:27
 
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