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 0 100:04
1983 0 76:05
1984 0 157:55
1985 0 193:05
1986 1 180:40
1987 0 99:15
1988 0 216:00
1989 0 269:46
1990 0 262:45
1991 0 405:47
1992 2 645:00
1993 1 397:58
1994 8 286:00
1995 1 224:45
1996 17 325:15
1997 13 356:45
1998 5 339:30
1999 4 267:15
2000 7 261:30
2001 9 524:35
2002 29 526:15
2003 37 567:15
2004 29 455:05
2005 50 601:15
2006 26 389:55
2007 60 432:55
2008 59 525:55
2009 45 399:05
2010 84 249:40
2011 56 319:15
2012 52 231:35
2013 51 270:55
2014 82 291:35
2015 65 177:30
2016 45 230:15
2017 40 250:05
2018 118 318:16
2019 233 584:19
2020 301 587:17
2021 424 644:27
 
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