Graph

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

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 6 143:25
1982 11 100:04
1983 3 76:05
1984 13 157:55
1985 3 193:05
1986 190 180:40
1987 52 99:15
1988 27 216:00
1989 109 269:46
1990 134 262:45
1991 77 405:47
1992 672 645:00
1993 375 397:58
1994 359 286:00
1995 104 224:45
1996 344 328:00
1997 62 356:45
1998 379 339:30
1999 391 267:15
2000 196 261:30
2001 138 525:35
2002 103 526:15
2003 4802 567:15
2004 547 455:05
2005 535 601:15
2006 136 389:55
2007 527 432:55
2008 251 525:55
2009 428 399:05
2010 597 249:40
2011 672 319:15
2012 296 231:35
2013 451 270:55
2014 64 291:35
2015 51 177:30
2016 75 230:15
2017 125 250:05
2018 174 318:16
2019 766 584:19
2020 531 587:17
2021 492 646:27
2022 983 640:14
2023 40 53:51
 
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