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 0 100:04
1983 0 76:05
1984 0 157:55
1985 0 193:05
1986 0 180:40
1987 0 99:15
1988 1 216:00
1989 2 269:46
1990 1 262:45
1991 1 405:47
1992 4 645:00
1993 5 397:58
1994 5 286:00
1995 6 224:45
1996 13 325:15
1997 7 356:45
1998 7 339:30
1999 7 267:15
2000 4 261:30
2001 12 524:35
2002 24 526:15
2003 16 567:15
2004 21 455:05
2005 28 601:15
2006 14 389:55
2007 26 432:55
2008 20 525:55
2009 36 399:05
2010 20 249:40
2011 31 319:15
2012 17 231:35
2013 16 270:55
2014 24 291:35
2015 11 177:30
2016 26 230:15
2017 17 250:05
2018 19 318:16
2019 25 584:19
2020 21 587:17
2021 22 563:27
 
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