Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites
Don't use roostmigration

Year Totals Observation hours
1900 0 5:30
1980 16 2:00
1981 309 143:25
1982 111 100:04
1983 46 76:05
1984 622 157:55
1985 159 193:05
1986 320 180:40
1987 206 99:15
1988 79 216:00
1989 994 269:46
1990 462 262:45
1991 545 405:47
1992 2431 645:00
1993 649 397:58
1994 476 286:00
1995 2576 224:45
1996 41507 328:00
1997 786 356:45
1998 853 339:30
1999 2125 267:15
2000 921 261:30
2001 4422 525:35
2002 2782 526:15
2003 4019 567:15
2004 3241 455:05
2005 5080 601:15
2006 38690 389:55
2007 7841 432:55
2008 33395 525:55
2009 1818 399:05
2010 3167 249:40
2011 10094 319:15
2012 1148 231:35
2013 78921 270:55
2014 5416 291:35
2015 1760 177:30
2016 3080 230:15
2017 2241 250:05
2018 8626 318:16
2019 11469 584:19
2020 21745 587:17
2021 41875 646:27
2022 101667 640:14
 
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