Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 8 5:30
1980 0 2:00
1981 65 143:25
1982 26 100:04
1983 0 76:05
1984 928 157:55
1985 67 193:05
1986 50 180:40
1987 11 99:15
1988 143 216:00
1989 459 269:46
1990 214 262:45
1991 1108 405:47
1992 106 645:00
1993 1845 397:58
1994 772 286:00
1995 79 224:45
1996 703 325:15
1997 219 356:45
1998 139 339:30
1999 333 267:15
2000 149 261:30
2001 432 524:35
2002 154 526:15
2003 74 567:15
2004 265 455:05
2005 1579 601:15
2006 45 389:55
2007 74 432:55
2008 387 525:55
2009 207 399:05
2010 253 249:40
2011 602 319:15
2012 58 231:35
2013 12 270:55
2014 12 291:35
2015 18 177:30
2016 48 230:15
2017 81 250:05
2018 23 318:16
2019 25 584:19
2020 63 587:17
2021 43 644:27
 
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