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 5 100:04
1983 0 76:05
1984 4 157:55
1985 6 193:05
1986 0 180:40
1987 0 99:15
1988 2 216:00
1989 2 269:46
1990 6 262:45
1991 7 405:47
1992 17 645:00
1993 15 397:58
1994 23 286:00
1995 1 224:45
1996 2 325:15
1997 0 356:45
1998 0 339:30
1999 10 267:15
2000 3 261:30
2001 6 524:35
2002 2 526:15
2003 1 567:15
2004 5 455:05
2005 0 601:15
2006 3 389:55
2007 4 432:55
2008 2 525:55
2009 0 399:05
2010 0 249:40
2011 2 319:15
2012 0 231:35
2013 4 270:55
2014 0 291:35
2015 0 177:30
2016 0 230:15
2017 0 250:05
2018 0 318:16
2019 9 584:19
2020 2 587:17
2021 1 646:27
 
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