Graph

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

Year Totals Observation hours
1900 34 5:30
1980 0 2:00
1981 921 143:25
1982 931 100:04
1983 284 76:05
1984 430 157:55
1985 249 193:05
1986 599 180:40
1987 353 99:15
1988 978 216:00
1989 537 269:46
1990 491 262:45
1991 320 405:47
1992 2086 645:00
1993 1455 397:58
1994 982 286:00
1995 733 224:45
1996 431 328:00
1997 1274 356:45
1998 1423 339:30
1999 709 267:15
2000 821 261:30
2001 805 525:35
2002 556 526:15
2003 444 567:15
2004 386 455:05
2005 451 601:15
2006 223 389:55
2007 185 432:55
2008 426 525:55
2009 129 399:05
2010 50 249:40
2011 135 319:15
2012 106 231:35
2013 15 270:55
2014 36 291:35
2015 7 177:30
2016 48 230:15
2017 39 250:05
2018 55 318:16
2019 76 584:19
2020 81 587:17
2021 50 646:27
2022 33 525:10
 
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