Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 2 2:00
1981 0 143:25
1982 0 100:04
1983 66 76:05
1984 488 157:55
1985 267 193:05
1986 493 180:40
1987 343 99:15
1988 42 216:00
1989 919 269:46
1990 2518 262:45
1991 2931 405:47
1992 1086 645:00
1993 668 397:58
1994 1455 286:00
1995 0 224:45
1996 1121 325:15
1997 1222 356:45
1998 738 339:30
1999 1 267:15
2000 106 261:30
2001 29 524:35
2002 3 526:15
2003 1 567:15
2004 0 455:05
2005 1363 601:15
2006 80 389:55
2007 116 432:55
2008 5 525:55
2009 401 399:05
2010 4 249:40
2011 0 319:15
2012 0 231:35
2013 16 270:55
2014 4 291:35
2015 0 177:30
2016 0 230:15
2017 0 250:05
2018 7 318:16
2019 166 584:19
2020 0 587:17
2021 0 539:42
 
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