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