Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 11 143:25
1982 0 100:04
1983 0 76:05
1984 17 157:55
1985 12 193:05
1986 10 180:40
1987 8 99:15
1988 16 216:00
1989 25 269:46
1990 43 262:45
1991 47 405:47
1992 50 645:00
1993 27 397:58
1994 78 286:00
1995 49 224:45
1996 66 325:15
1997 51 356:45
1998 59 339:30
1999 51 267:15
2000 67 261:30
2001 82 524:35
2002 67 526:15
2003 54 567:15
2004 50 455:05
2005 108 601:15
2006 77 389:55
2007 57 432:55
2008 137 525:55
2009 71 399:05
2010 19 249:40
2011 78 319:15
2012 84 231:35
2013 9 270:55
2014 63 291:35
2015 9 177:30
2016 29 230:15
2017 57 250:05
2018 16 318:16
2019 46 584:19
2020 25 587:17
2021 46 644:27
 
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