Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 10 5:30
1980 0 2:00
1981 51 143:25
1982 184 100:04
1983 41 76:05
1984 60 157:55
1985 67 193:05
1986 49 180:40
1987 88 99:15
1988 346 216:00
1989 162 269:46
1990 278 262:45
1991 42 405:47
1992 277 645:00
1993 283 397:58
1994 212 286:00
1995 190 224:45
1996 35 325:15
1997 102 356:45
1998 396 339:30
1999 287 267:15
2000 450 261:30
2001 529 524:35
2002 114 526:15
2003 62 567:15
2004 175 455:05
2005 280 601:15
2006 217 389:55
2007 24 432:55
2008 744 525:55
2009 113 399:05
2010 5 249:40
2011 345 319:15
2012 145 231:35
2013 0 270:55
2014 169 291:35
2015 1 177:30
2016 138 230:15
2017 137 250:05
2018 148 318:16
2019 70 584:19
2020 94 587:17
2021 19 563:27
 
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