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 25 76:05
1984 0 157:55
1985 0 193:05
1986 1 180:40
1987 0 99:15
1988 1 216:00
1989 10 269:46
1990 6 262:45
1991 33 405:47
1992 4 645:00
1993 0 397:58
1994 8 286:00
1995 0 224:45
1996 1 328:00
1997 18 356:45
1998 3 339:30
1999 5 267:15
2000 1 261:30
2001 4 525:35
2002 0 526:15
2003 9 567:15
2004 3 455:05
2005 3 601:15
2006 2 389:55
2007 1 432:55
2008 3 525:55
2009 0 399:05
2010 0 249:40
2011 0 319:15
2012 0 231:35
2013 13 270:55
2014 0 291:35
2015 0 177:30
2016 0 230:15
2017 0 250:05
2018 0 318:16
2019 0 584:19
2020 0 587:17
2021 8 646:27
2022 0 477:05
 
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