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 0 193:05
1986 0 180:40
1987 0 99:15
1988 0 216:00
1989 0 269:46
1990 1 262:45
1991 1 405:47
1992 0 645:00
1993 0 397:58
1994 8 286:00
1995 6 224:45
1996 4 325:15
1997 12 356:45
1998 0 339:30
1999 0 267:15
2000 7 261:30
2001 22 524:35
2002 40 526:15
2003 66 567:15
2004 48 455:05
2005 67 601:15
2006 9 389:55
2007 22 432:55
2008 21 525:55
2009 52 399:05
2010 24 249:40
2011 15 319:15
2012 9 231:35
2013 8 270:55
2014 9 291:35
2015 1 177:30
2016 1 230:15
2017 6 250:05
2018 5 318:16
2019 186 584:19
2020 30 587:17
2021 87 646:27
 
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