Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 12 143:25
1982 48 100:04
1983 676 76:05
1984 887 157:55
1985 162 193:05
1986 1322 180:40
1987 60 99:15
1988 210 216:00
1989 2756 269:46
1990 750 262:45
1991 1556 405:47
1992 4338 645:00
1993 3076 397:58
1994 2799 286:00
1995 3998 224:45
1996 4606 325:15
1997 1825 356:45
1998 3686 339:30
1999 7530 267:15
2000 1081 261:30
2001 2943 524:35
2002 1657 526:15
2003 6110 567:15
2004 3710 455:05
2005 2856 601:15
2006 4588 389:55
2007 2564 432:55
2008 1507 525:55
2009 3297 399:05
2010 1573 249:40
2011 3680 319:15
2012 1543 231:35
2013 3152 270:55
2014 1161 291:35
2015 2396 177:30
2016 3543 230:15
2017 1757 250:05
2018 3039 318:16
2019 2347 584:19
2020 2256 587:17
2021 1771 550:12
 
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