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 2 100:04
1983 0 76:05
1984 3 157:55
1985 3 193:05
1986 8 180:40
1987 2 99:15
1988 0 216:00
1989 6 269:46
1990 5 262:45
1991 5 405:47
1992 51 645:00
1993 41 397:58
1994 5 286:00
1995 14 224:45
1996 8 325:15
1997 9 356:45
1998 26 339:30
1999 19 267:15
2000 22 261:30
2001 39 524:35
2002 49 526:15
2003 52 567:15
2004 45 455:05
2005 48 601:15
2006 17 389:55
2007 27 432:55
2008 44 525:55
2009 60 399:05
2010 16 249:40
2011 33 319:15
2012 61 231:35
2013 56 270:55
2014 35 291:35
2015 9 177:30
2016 48 230:15
2017 39 250:05
2018 72 318:16
2019 130 584:19
2020 102 587:17
2021 21 644:27
 
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