Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 2 143:25
1982 41 100:04
1983 24 76:05
1984 30 157:55
1985 67 193:05
1986 28 180:40
1987 24 99:15
1988 2 216:00
1989 11 269:46
1990 66 262:45
1991 126 405:47
1992 204 645:00
1993 231 397:58
1994 265 286:00
1995 8 224:45
1996 384 325:15
1997 184 356:45
1998 183 339:30
1999 217 267:15
2000 27 261:30
2001 786 524:35
2002 390 526:15
2003 237 567:15
2004 1070 455:05
2005 365 601:15
2006 908 389:55
2007 96 432:55
2008 11 525:55
2009 134 399:05
2010 64 249:40
2011 61 319:15
2012 114 231:35
2013 874 270:55
2014 49 291:35
2015 43 177:30
2016 98 230:15
2017 42 250:05
2018 588 318:16
2019 70 584:19
2020 1120 587:17
2021 99 644:27
 
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