Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 36 143:25
1982 51 100:04
1983 8 76:05
1984 56 157:55
1985 62 193:05
1986 59 180:40
1987 68 99:15
1988 155 216:00
1989 272 269:46
1990 355 262:45
1991 289 405:47
1992 445 645:00
1993 347 397:58
1994 498 286:00
1995 391 224:45
1996 341 325:15
1997 274 356:45
1998 401 339:30
1999 348 267:15
2000 388 261:30
2001 828 524:35
2002 655 526:15
2003 467 567:15
2004 607 455:05
2005 516 601:15
2006 367 389:55
2007 495 432:55
2008 683 525:55
2009 476 399:05
2010 290 249:40
2011 483 319:15
2012 256 231:35
2013 363 270:55
2014 321 291:35
2015 115 177:30
2016 281 230:15
2017 435 250:05
2018 322 318:16
2019 492 584:19
2020 830 587:17
2021 381 539:42
 
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