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 1 100:04
1983 0 76:05
1984 0 157:55
1985 0 193:05
1986 0 180:40
1987 2 99:15
1988 0 216:00
1989 0 269:46
1990 1 262:45
1991 1 405:47
1992 1 645:00
1993 4 397:58
1994 1 286:00
1995 1 224:45
1996 1 325:15
1997 0 356:45
1998 2 339:30
1999 0 267:15
2000 0 261:30
2001 1 524:35
2002 0 526:15
2003 5 567:15
2004 0 455:05
2005 1 601:15
2006 1 389:55
2007 1 432:55
2008 6 525:55
2009 0 399:05
2010 1 249:40
2011 2 319:15
2012 0 231:35
2013 2 270:55
2014 1 291:35
2015 0 177:30
2016 0 230:15
2017 0 250:05
2018 0 318:16
2019 1 584:19
2020 0 587:17
2021 0 550:12
 
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