Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 1 5:30
1980 1 2:00
1981 786 143:25
1982 676 100:04
1983 319 76:05
1984 394 157:55
1985 243 193:05
1986 913 180:40
1987 480 99:15
1988 1906 216:00
1989 2189 269:46
1990 788 262:45
1991 453 405:47
1992 4433 645:00
1993 1841 397:58
1994 1823 286:00
1995 3582 224:45
1996 2674 325:15
1997 1629 356:45
1998 2143 339:30
1999 2693 267:15
2000 3363 261:30
2001 2571 524:35
2002 2072 526:15
2003 2054 567:15
2004 3252 455:05
2005 2022 601:15
2006 3102 389:55
2007 3026 432:55
2008 9660 525:55
2009 3072 399:05
2010 3431 249:40
2011 6769 319:15
2012 2318 231:35
2013 4484 270:55
2014 2082 291:35
2015 778 177:30
2016 4389 230:15
2017 5754 250:05
2018 1828 318:16
2019 11503 584:19
2020 11962 587:17
2021 4121 644:27
 
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