Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 47 5:30
1980 0 2:00
1981 840 143:25
1982 504 100:04
1983 87 76:05
1984 911 157:55
1985 1280 193:05
1986 397 180:40
1987 112 99:15
1988 1773 216:00
1989 1268 269:46
1990 722 262:45
1991 2575 405:47
1992 1030 645:00
1993 3252 397:58
1994 1500 286:00
1995 679 224:45
1996 2893 325:15
1997 838 356:45
1998 652 339:30
1999 2213 267:15
2000 2303 261:30
2001 3324 524:35
2002 1712 526:15
2003 835 567:15
2004 1026 455:05
2005 4160 601:15
2006 683 389:55
2007 1464 432:55
2008 2246 525:55
2009 2500 399:05
2010 1181 249:40
2011 2121 319:15
2012 474 231:35
2013 854 270:55
2014 172 291:35
2015 195 177:30
2016 498 230:15
2017 1837 250:05
2018 619 318:16
2019 867 584:19
2020 1506 587:17
2021 570 550:12
 
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