Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 4 5:30
1980 0 2:00
1981 6 143:25
1982 151 100:04
1983 2287 76:05
1984 654 157:55
1985 17 193:05
1986 103 180:40
1987 16 99:15
1988 19 216:00
1989 45 269:46
1990 18 262:45
1991 131 405:47
1992 46 645:00
1993 76 397:58
1994 490 286:00
1995 52 224:45
1996 63 325:15
1997 24 356:45
1998 52 339:30
1999 43 267:15
2000 18 261:30
2001 179 524:35
2002 1176 526:15
2003 111 567:15
2004 55 455:05
2005 54 601:15
2006 74 389:55
2007 86 432:55
2008 187 525:55
2009 46 399:05
2010 17 249:40
2011 42 319:15
2012 41 231:35
2013 108 270:55
2014 24 291:35
2015 12 177:30
2016 22 230:15
2017 8 250:05
2018 12 318:16
2019 30 584:19
2020 63 587:17
2021 79 644:27
 
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