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 3 100:04
1983 0 76:05
1984 1 157:55
1985 0 193:05
1986 2 180:40
1987 2 99:15
1988 2 216:00
1989 6 269:46
1990 17 262:45
1991 10 405:47
1992 10 645:00
1993 1 397:58
1994 1 286:00
1995 1 224:45
1996 3 325:15
1997 11 356:45
1998 1 339:30
1999 7 267:15
2000 6 261:30
2001 7 524:35
2002 5 526:15
2003 18 567:15
2004 15 455:05
2005 22 601:15
2006 5 389:55
2007 21 432:55
2008 15 525:55
2009 45 399:05
2010 9 249:40
2011 18 319:15
2012 14 231:35
2013 3 270:55
2014 8 291:35
2015 3 177:30
2016 1 230:15
2017 3 250:05
2018 8 318:16
2019 11 584:19
2020 5 587:17
2021 0 644:27
 
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