Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 7 5:30
1980 0 2:00
1981 25 143:25
1982 32 100:04
1983 8 76:05
1984 131 157:55
1985 24 193:05
1986 33 180:40
1987 21 99:15
1988 354 216:00
1989 133 269:46
1990 268 262:45
1991 271 405:47
1992 165 645:00
1993 302 397:58
1994 456 286:00
1995 213 224:45
1996 638 325:15
1997 564 356:45
1998 354 339:30
1999 285 267:15
2000 127 261:30
2001 533 524:35
2002 150 526:15
2003 160 567:15
2004 287 455:05
2005 614 601:15
2006 259 389:55
2007 468 432:55
2008 934 525:55
2009 452 399:05
2010 208 249:40
2011 922 319:15
2012 84 231:35
2013 11 270:55
2014 116 291:35
2015 44 177:30
2016 101 230:15
2017 279 250:05
2018 141 318:16
2019 75 584:19
2020 260 587:17
2021 207 539:42
 
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