Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 1 5:30
1980 0 2:00
1981 13 143:25
1982 5 100:04
1983 1 76:05
1984 9 157:55
1985 6 193:05
1986 10 180:40
1987 10 99:15
1988 26 216:00
1989 48 269:46
1990 58 262:45
1991 52 405:47
1992 64 645:00
1993 456 397:58
1994 74 286:00
1995 34 224:45
1996 23 325:15
1997 57 356:45
1998 44 339:30
1999 20 267:15
2000 38 261:30
2001 125 524:35
2002 39 526:15
2003 35 567:15
2004 84 455:05
2005 40 601:15
2006 22 389:55
2007 63 432:55
2008 132 525:55
2009 16 399:05
2010 18 249:40
2011 71 319:15
2012 34 231:35
2013 6 270:55
2014 6 291:35
2015 14 177:30
2016 14 230:15
2017 2 250:05
2018 18 318:16
2019 84 584:19
2020 24 587:17
2021 29 644:27
 
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