Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 1 2:00
1981 4879 143:25
1982 3598 100:04
1983 3 76:05
1984 17 157:55
1985 10 193:05
1986 61 180:40
1987 2 99:15
1988 741 216:00
1989 300 269:46
1990 741 262:45
1991 150 405:47
1992 251 645:00
1993 8341 397:58
1994 93 286:00
1995 434 224:45
1996 977 325:15
1997 772 356:45
1998 674 339:30
1999 98 267:15
2000 224 261:30
2001 597 524:35
2002 381 526:15
2003 294 567:15
2004 371 455:05
2005 302 601:15
2006 264 389:55
2007 581 432:55
2008 895 525:55
2009 415 399:05
2010 213 249:40
2011 887 319:15
2012 371 231:35
2013 209 270:55
2014 631 291:35
2015 410 177:30
2016 208 230:15
2017 682 250:05
2018 754 318:16
2019 2456 584:19
2020 3666 587:17
2021 661 563:27
 
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