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 5 100:04
1983 0 76:05
1984 99 157:55
1985 34 193:05
1986 47 180:40
1987 8 99:15
1988 26 216:00
1989 79 269:46
1990 23 262:45
1991 67 405:47
1992 14 645:00
1993 15 397:58
1994 33 286:00
1995 26 224:45
1996 23 325:15
1997 22 356:45
1998 22 339:30
1999 15 267:15
2000 2 261:30
2001 20 524:35
2002 36 526:15
2003 68 567:15
2004 95 455:05
2005 30 601:15
2006 42 389:55
2007 51 432:55
2008 86 525:55
2009 163 399:05
2010 35 249:40
2011 117 319:15
2012 34 231:35
2013 25 270:55
2014 64 291:35
2015 8 177:30
2016 9 230:15
2017 5 250:05
2018 17 318:16
2019 12 584:19
2020 49 587:17
2021 33 569:27
 
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