Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 7 143:25
1982 4 100:04
1983 48 76:05
1984 123 157:55
1985 51 193:05
1986 89 180:40
1987 108 99:15
1988 45 216:00
1989 212 269:46
1990 124 262:45
1991 263 405:47
1992 285 645:00
1993 232 397:58
1994 283 286:00
1995 224 224:45
1996 181 325:15
1997 240 356:45
1998 465 339:30
1999 215 267:15
2000 141 261:30
2001 775 524:35
2002 507 526:15
2003 645 567:15
2004 479 455:05
2005 568 601:15
2006 476 389:55
2007 481 432:55
2008 220 525:55
2009 487 399:05
2010 393 249:40
2011 246 319:15
2012 163 231:35
2013 737 270:55
2014 167 291:35
2015 66 177:30
2016 165 230:15
2017 124 250:05
2018 237 318:16
2019 323 584:19
2020 329 587:17
2021 496 644:27
 
Partners