Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 1 5:30
1980 0 2:00
1981 229 143:25
1982 451 100:04
1983 284 76:05
1984 1539 157:55
1985 408 193:05
1986 490 180:40
1987 312 99:15
1988 326 216:00
1989 1128 269:46
1990 1633 262:45
1991 2421 405:47
1992 2110 645:00
1993 1467 397:58
1994 4062 286:00
1995 857 224:45
1996 2527 325:15
1997 1363 356:45
1998 1215 339:30
1999 1455 267:15
2000 424 261:30
2001 1447 524:35
2002 1955 526:15
2003 1521 567:15
2004 419 455:05
2005 531 601:15
2006 719 389:55
2007 663 432:55
2008 453 525:55
2009 420 399:05
2010 98 249:40
2011 712 319:15
2012 78 231:35
2013 399 270:55
2014 185 291:35
2015 275 177:30
2016 286 230:15
2017 421 250:05
2018 836 318:16
2019 640 584:19
2020 844 587:17
2021 340 644:27
 
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