Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 4 143:25
1982 10 100:04
1983 1 76:05
1984 6 157:55
1985 2 193:05
1986 1 180:40
1987 9 99:15
1988 12 216:00
1989 14 269:46
1990 7 262:45
1991 13 405:47
1992 42 645:00
1993 17 397:58
1994 32 286:00
1995 27 224:45
1996 6 325:15
1997 47 356:45
1998 91 339:30
1999 79 267:15
2000 52 261:30
2001 65 524:35
2002 128 526:15
2003 133 567:15
2004 163 455:05
2005 111 601:15
2006 67 389:55
2007 57 432:55
2008 192 525:55
2009 289 399:05
2010 121 249:40
2011 242 319:15
2012 149 231:35
2013 223 270:55
2014 87 291:35
2015 60 177:30
2016 125 230:15
2017 77 250:05
2018 160 318:16
2019 183 584:19
2020 285 587:17
2021 169 524:47
 
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