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 0 100:04
1983 0 76:05
1984 3 157:55
1985 0 193:05
1986 0 180:40
1987 4 99:15
1988 50 216:00
1989 32 269:46
1990 93 262:45
1991 22 405:47
1992 40 645:00
1993 68 397:58
1994 37 286:00
1995 31 224:45
1996 13 328:00
1997 14 356:45
1998 19 339:30
1999 37 267:15
2000 30 261:30
2001 69 525:35
2002 29 526:15
2003 26 567:15
2004 48 455:05
2005 39 601:15
2006 28 389:55
2007 46 432:55
2008 57 525:55
2009 27 399:05
2010 9 249:40
2011 486 319:15
2012 27 231:35
2013 88 270:55
2014 37 291:35
2015 7 177:30
2016 63 230:15
2017 170 250:05
2018 53 318:16
2019 161 584:19
2020 65 587:17
2021 105 646:27
2022 83 477:05
 
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