Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 1 143:25
1982 0 100:04
1983 0 76:05
1984 0 157:55
1985 0 193:05
1986 0 180:40
1987 0 99:15
1988 2 216:00
1989 2 269:46
1990 3 262:45
1991 8 405:47
1992 21 645:00
1993 133 397:58
1994 16 286:00
1995 141 224:45
1996 230 325:15
1997 23 356:45
1998 17 339:30
1999 156 267:15
2000 9 261:30
2001 92 524:35
2002 22 526:15
2003 87 567:15
2004 24 455:05
2005 79 601:15
2006 427 389:55
2007 33 432:55
2008 35 525:55
2009 61 399:05
2010 43 249:40
2011 128 319:15
2012 61 231:35
2013 447 270:55
2014 56 291:35
2015 47 177:30
2016 223 230:15
2017 20 250:05
2018 97 318:16
2019 147 584:19
2020 100 587:17
2021 291 550:12
 
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