Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 41 143:25
1982 14 100:04
1983 2 76:05
1984 444 157:55
1985 124 193:05
1986 65 180:40
1987 76 99:15
1988 29 216:00
1989 160 269:46
1990 159 262:45
1991 246 405:47
1992 82 645:00
1993 352 397:58
1994 125 286:00
1995 94 224:45
1996 50 325:15
1997 57 356:45
1998 68 339:30
1999 237 267:15
2000 30 261:30
2001 98 524:35
2002 71 526:15
2003 126 567:15
2004 61 455:05
2005 54 601:15
2006 30 389:55
2007 147 432:55
2008 109 525:55
2009 81 399:05
2010 34 249:40
2011 227 319:15
2012 15 231:35
2013 126 270:55
2014 105 291:35
2015 50 177:30
2016 23 230:15
2017 65 250:05
2018 56 318:16
2019 165 584:19
2020 100 587:17
2021 178 550:12
 
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