Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 2 143:25
1982 0 100:04
1983 4 76:05
1984 11 157:55
1985 12 193:05
1986 2 180:40
1987 1 99:15
1988 4 216:00
1989 21 269:46
1990 30 262:45
1991 13 405:47
1992 35 645:00
1993 26 397:58
1994 33 286:00
1995 22 224:45
1996 16 325:15
1997 46 356:45
1998 20 339:30
1999 13 267:15
2000 15 261:30
2001 59 524:35
2002 61 526:15
2003 66 567:15
2004 50 455:05
2005 38 601:15
2006 49 389:55
2007 39 432:55
2008 40 525:55
2009 15 399:05
2010 16 249:40
2011 51 319:15
2012 33 231:35
2013 52 270:55
2014 98 291:35
2015 43 177:30
2016 155 230:15
2017 68 250:05
2018 131 318:16
2019 241 584:19
2020 227 587:17
2021 247 563:27
 
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