Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 17 5:30
1980 0 2:00
1981 266 143:25
1982 169 100:04
1983 269 76:05
1984 313 157:55
1985 578 193:05
1986 2873 180:40
1987 305 99:15
1988 488 216:00
1989 604 269:46
1990 819 262:45
1991 413 405:47
1992 2049 645:00
1993 3760 397:58
1994 1400 286:00
1995 873 224:45
1996 1013 325:15
1997 745 356:45
1998 1346 339:30
1999 1215 267:15
2000 1197 261:30
2001 5442 524:35
2002 3047 526:15
2003 5677 567:15
2004 8970 455:05
2005 5886 601:15
2006 1564 389:55
2007 1860 432:55
2008 1863 525:55
2009 5425 399:05
2010 1207 249:40
2011 848 319:15
2012 1611 231:35
2013 953 270:55
2014 734 291:35
2015 316 177:30
2016 321 230:15
2017 634 250:05
2018 1307 318:16
2019 3194 584:19
2020 3021 587:17
2021 4847 644:27
 
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