Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 4 5:30
1980 0 2:00
1981 196 143:25
1982 56 100:04
1983 32 76:05
1984 1070 157:55
1985 124 193:05
1986 274 180:40
1987 161 99:15
1988 171 216:00
1989 413 269:46
1990 311 262:45
1991 625 405:47
1992 243 645:00
1993 1564 397:58
1994 558 286:00
1995 569 224:45
1996 1165 325:15
1997 166 356:45
1998 228 339:30
1999 638 267:15
2000 379 261:30
2001 539 524:35
2002 322 526:15
2003 531 567:15
2004 623 455:05
2005 635 601:15
2006 478 389:55
2007 1057 432:55
2008 1067 525:55
2009 797 399:05
2010 337 249:40
2011 2572 319:15
2012 219 231:35
2013 1218 270:55
2014 766 291:35
2015 130 177:30
2016 486 230:15
2017 1237 250:05
2018 407 318:16
2019 1026 584:19
2020 945 587:17
2021 1288 644:27
 
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