Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 5 143:25
1982 15 100:04
1983 7 76:05
1984 7 157:55
1985 2 193:05
1986 1 180:40
1987 9 99:15
1988 15 216:00
1989 7 269:46
1990 14 262:45
1991 23 405:47
1992 31 645:00
1993 16 397:58
1994 59 286:00
1995 22 224:45
1996 8 325:15
1997 22 356:45
1998 16 339:30
1999 12 267:15
2000 35 261:30
2001 39 524:35
2002 28 526:15
2003 54 567:15
2004 36 455:05
2005 74 601:15
2006 46 389:55
2007 16 432:55
2008 87 525:55
2009 61 399:05
2010 21 249:40
2011 40 319:15
2012 61 231:35
2013 20 270:55
2014 16 291:35
2015 0 177:30
2016 23 230:15
2017 23 250:05
2018 16 318:16
2019 47 584:19
2020 43 587:17
2021 10 524:47
 
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