Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 5 5:30
1980 206 2:00
1981 4046 143:25
1982 6355 100:04
1983 5004 76:05
1984 12555 157:55
1985 5228 193:05
1986 25912 180:40
1987 4864 99:15
1988 2650 216:00
1989 21018 269:46
1990 15813 262:45
1991 28569 405:47
1992 23351 645:00
1993 55715 397:58
1994 12783 286:00
1995 19787 224:45
1996 126738 328:00
1997 34720 356:45
1998 38911 339:30
1999 25148 267:15
2000 8298 261:30
2001 33023 525:35
2002 41716 526:15
2003 118011 567:15
2004 42663 455:05
2005 86428 601:15
2006 52884 389:55
2007 29211 432:55
2008 22040 525:55
2009 27398 399:05
2010 27993 249:40
2011 78944 319:15
2012 17374 231:35
2013 79644 270:55
2014 14340 291:35
2015 23721 177:30
2016 74628 230:15
2017 18723 250:05
2018 60527 318:16
2019 33685 584:19
2020 29080 587:17
2021 285148 646:27
2022 51757 477:05
 
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