Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 62 143:25
1982 7 100:04
1983 18 76:05
1984 29 157:55
1985 18 193:05
1986 12 180:40
1987 14 99:15
1988 68 216:00
1989 71 269:46
1990 112 262:45
1991 215 405:47
1992 107 645:00
1993 126 397:58
1994 140 286:00
1995 38 224:45
1996 175 325:15
1997 87 356:45
1998 118 339:30
1999 68 267:15
2000 115 261:30
2001 79 524:35
2002 152 526:15
2003 339 567:15
2004 280 455:05
2005 153 601:15
2006 74 389:55
2007 344 432:55
2008 375 525:55
2009 303 399:05
2010 218 249:40
2011 197 319:15
2012 76 231:35
2013 211 270:55
2014 150 291:35
2015 69 177:30
2016 62 230:15
2017 278 250:05
2018 118 318:16
2019 586 584:19
2020 435 587:17
2021 199 539:42
 
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