Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 447 143:25
1982 272 100:04
1983 152 76:05
1984 245 157:55
1985 229 193:05
1986 923 180:40
1987 294 99:15
1988 268 216:00
1989 312 269:46
1990 152 262:45
1991 349 405:47
1992 239 645:00
1993 613 397:58
1994 230 286:00
1995 190 224:45
1996 1475 325:15
1997 230 356:45
1998 128 339:30
1999 148 267:15
2000 101 261:30
2001 671 524:35
2002 710 526:15
2003 443 567:15
2004 302 455:05
2005 567 601:15
2006 460 389:55
2007 323 432:55
2008 213 525:55
2009 459 399:05
2010 468 249:40
2011 363 319:15
2012 250 231:35
2013 2546 270:55
2014 225 291:35
2015 71 177:30
2016 181 230:15
2017 76 250:05
2018 233 318:16
2019 366 584:19
2020 439 587:17
2021 492 563:27
 
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