Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 20 5:30
1980 0 2:00
1981 259 143:25
1982 202 100:04
1983 34 76:05
1984 324 157:55
1985 274 193:05
1986 614 180:40
1987 231 99:15
1988 1504 216:00
1989 443 269:46
1990 543 262:45
1991 676 405:47
1992 1017 645:00
1993 1107 397:58
1994 879 286:00
1995 225 224:45
1996 1032 328:00
1997 639 356:45
1998 556 339:30
1999 778 267:15
2000 444 261:30
2001 1200 524:35
2002 792 526:15
2003 308 567:15
2004 586 455:05
2005 3381 601:15
2006 753 389:55
2007 577 432:55
2008 2385 525:55
2009 2431 399:05
2010 800 249:40
2011 1079 319:15
2012 1255 231:35
2013 1718 270:55
2014 456 291:35
2015 483 177:30
2016 1509 230:15
2017 3024 250:05
2018 1452 318:16
2019 967 584:19
2020 2709 587:17
2021 741 646:27
 
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