Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 125 5:30
1980 0 2:00
1981 26 143:25
1982 108 100:04
1983 3 76:05
1984 115 157:55
1985 125 193:05
1986 23 180:40
1987 77 99:15
1988 471 216:00
1989 323 269:46
1990 152 262:45
1991 276 405:47
1992 313 645:00
1993 388 397:58
1994 466 286:00
1995 90 224:45
1996 505 325:15
1997 187 356:45
1998 215 339:30
1999 319 267:15
2000 203 261:30
2001 514 524:35
2002 336 526:15
2003 115 567:15
2004 228 455:05
2005 972 601:15
2006 353 389:55
2007 351 432:55
2008 1062 525:55
2009 586 399:05
2010 298 249:40
2011 616 319:15
2012 246 231:35
2013 110 270:55
2014 87 291:35
2015 27 177:30
2016 310 230:15
2017 454 250:05
2018 192 318:16
2019 271 584:19
2020 803 587:17
2021 160 644:27
 
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