Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 2 5:30
1980 0 2:00
1981 12 143:25
1982 8 100:04
1983 4 76:05
1984 4 157:55
1985 6 193:05
1986 15 180:40
1987 6 99:15
1988 5 216:00
1989 11 269:46
1990 30 262:45
1991 48 405:47
1992 23 645:00
1993 46 397:58
1994 35 286:00
1995 27 224:45
1996 24 328:00
1997 31 356:45
1998 33 339:30
1999 40 267:15
2000 43 261:30
2001 83 525:35
2002 54 526:15
2003 57 567:15
2004 63 455:05
2005 58 601:15
2006 46 389:55
2007 56 432:55
2008 93 525:55
2009 66 399:05
2010 30 249:40
2011 138 319:15
2012 33 231:35
2013 25 270:55
2014 66 291:35
2015 29 177:30
2016 74 230:15
2017 112 250:05
2018 61 318:16
2019 125 584:19
2020 155 587:17
2021 118 646:27
2022 116 477:05
 
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