Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
Favourites

Year Totals Observation hours
1900 25 5:30
1980 0 2:00
1981 422 143:25
1982 212 100:04
1983 83 76:05
1984 183 157:55
1985 293 193:05
1986 197 180:40
1987 216 99:15
1988 454 216:00
1989 169 269:46
1990 244 262:45
1991 485 405:47
1992 479 645:00
1993 480 397:58
1994 227 286:00
1995 237 224:45
1996 243 325:15
1997 429 356:45
1998 322 339:30
1999 355 267:15
2000 406 261:30
2001 573 524:35
2002 382 526:15
2003 830 567:15
2004 701 455:05
2005 716 601:15
2006 438 389:55
2007 616 432:55
2008 710 525:55
2009 605 399:05
2010 343 249:40
2011 353 319:15
2012 318 231:35
2013 137 270:55
2014 145 291:35
2015 145 177:30
2016 125 230:15
2017 141 250:05
2018 221 318:16
2019 323 584:19
2020 230 587:17
2021 201 524:47
 
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