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 7 76:05
1984 1 157:55
1985 5 193:05
1986 3 180:40
1987 4 99:15
1988 2 216:00
1989 5 269:46
1990 1 262:45
1991 5 405:47
1992 0 645:00
1993 4 397:58
1994 3 286:00
1995 2 224:45
1996 29 325:15
1997 0 356:45
1998 11 339:30
1999 3 267:15
2000 3 261:30
2001 0 524:35
2002 1 526:15
2003 8 567:15
2004 1 455:05
2005 2 601:15
2006 2 389:55
2007 0 432:55
2008 2 525:55
2009 4 399:05
2010 4 249:40
2011 7 319:15
2012 3 231:35
2013 7 270:55
2014 3 291:35
2015 3 177:30
2016 2 230:15
2017 0 250:05
2018 6 318:16
2019 5 584:19
2020 2 587:17
2021 2 646:27
 
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