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 1 100:04
1983 1 76:05
1984 0 157:55
1985 2 193:05
1986 3 180:40
1987 4 99:15
1988 6 216:00
1989 19 269:46
1990 15 262:45
1991 35 405:47
1992 37 645:00
1993 51 397:58
1994 62 286:00
1995 18 224:45
1996 20 325:15
1997 38 356:45
1998 44 339:30
1999 35 267:15
2000 56 261:30
2001 53 524:35
2002 36 526:15
2003 23 567:15
2004 30 455:05
2005 53 601:15
2006 10 389:55
2007 21 432:55
2008 24 525:55
2009 29 399:05
2010 8 249:40
2011 19 319:15
2012 14 231:35
2013 8 270:55
2014 15 291:35
2015 9 177:30
2016 17 230:15
2017 9 250:05
2018 15 318:16
2019 19 584:19
2020 19 587:17
2021 21 644:27
 
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