Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 2 143:25
1982 8 100:04
1983 0 76:05
1984 3 157:55
1985 2 193:05
1986 7 180:40
1987 12 99:15
1988 25 216:00
1989 18 269:46
1990 29 262:45
1991 58 405:47
1992 40 645:00
1993 53 397:58
1994 37 286:00
1995 20 224:45
1996 48 325:15
1997 34 356:45
1998 32 339:30
1999 30 267:15
2000 20 261:30
2001 47 524:35
2002 48 526:15
2003 68 567:15
2004 30 455:05
2005 20 601:15
2006 35 389:55
2007 38 432:55
2008 37 525:55
2009 27 399:05
2010 18 249:40
2011 36 319:15
2012 22 231:35
2013 76 270:55
2014 45 291:35
2015 38 177:30
2016 28 230:15
2017 72 250:05
2018 116 318:16
2019 114 584:19
2020 93 587:17
2021 21 644:27
 
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