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 6 193:05
1986 61 180:40
1987 8 99:15
1988 0 216:00
1989 180 269:46
1990 532 262:45
1991 5 405:47
1992 17 645:00
1993 0 397:58
1994 2 286:00
1995 0 224:45
1996 8 328:00
1997 1 356:45
1998 61 339:30
1999 197 267:15
2000 0 261:30
2001 210 524:35
2002 123 526:15
2003 23 567:15
2004 2 455:05
2005 6 601:15
2006 1 389:55
2007 21 432:55
2008 0 525:55
2009 0 399:05
2010 2 249:40
2011 5 319:15
2012 8 231:35
2013 1 270:55
2014 0 291:35
2015 0 177:30
2016 0 230:15
2017 178 250:05
2018 0 318:16
2019 129 584:19
2020 64 587:17
2021 70 646:27
 
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