Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 1 143:25
1982 0 100:04
1983 0 76:05
1984 0 157:55
1985 0 193:05
1986 0 180:40
1987 0 99:15
1988 0 216:00
1989 3 269:46
1990 13 262:45
1991 1 405:47
1992 3 645:00
1993 18 397:58
1994 1 286:00
1995 1 224:45
1996 8 325:15
1997 2 356:45
1998 5 339:30
1999 1 267:15
2000 1 261:30
2001 0 524:35
2002 0 526:15
2003 0 567:15
2004 7 455:05
2005 1 601:15
2006 0 389:55
2007 2 432:55
2008 69 525:55
2009 0 399:05
2010 0 249:40
2011 4 319:15
2012 0 231:35
2013 5 270:55
2014 0 291:35
2015 5 177:30
2016 1 230:15
2017 0 250:05
2018 3 318:16
2019 13 584:19
2020 7 587:17
2021 0 550:12
 
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