Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 19 143:25
1982 17 100:04
1983 19 76:05
1984 9 157:55
1985 36 193:05
1986 42 180:40
1987 3 99:15
1988 67 216:00
1989 120 269:46
1990 92 262:45
1991 82 405:47
1992 67 645:00
1993 40 397:58
1994 88 286:00
1995 12 224:45
1996 19 328:00
1997 44 356:45
1998 8 339:30
1999 44 267:15
2000 16 261:30
2001 51 524:35
2002 26 526:15
2003 112 567:15
2004 44 455:05
2005 41 601:15
2006 30 389:55
2007 28 432:55
2008 35 525:55
2009 217 399:05
2010 179 249:40
2011 104 319:15
2012 145 231:35
2013 170 270:55
2014 64 291:35
2015 51 177:30
2016 33 230:15
2017 21 250:05
2018 40 318:16
2019 40 584:19
2020 184 587:17
2021 63 646:27
 
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