Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 605 143:25
1982 177 100:04
1983 153 76:05
1984 906 157:55
1985 591 193:05
1986 174 180:40
1987 46 99:15
1988 166 216:00
1989 494 269:46
1990 335 262:45
1991 722 405:47
1992 368 645:00
1993 623 397:58
1994 839 286:00
1995 592 224:45
1996 308 325:15
1997 571 356:45
1998 1229 339:30
1999 363 267:15
2000 852 261:30
2001 917 524:35
2002 480 526:15
2003 971 567:15
2004 703 455:05
2005 652 601:15
2006 473 389:55
2007 378 432:55
2008 983 525:55
2009 470 399:05
2010 214 249:40
2011 632 319:15
2012 512 231:35
2013 271 270:55
2014 193 291:35
2015 335 177:30
2016 300 230:15
2017 199 250:05
2018 744 318:16
2019 814 584:19
2020 1622 587:17
2021 1262 539:42
 
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