Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 86 143:25
1982 144 100:04
1983 293 76:05
1984 682 157:55
1985 376 193:05
1986 1731 180:40
1987 102 99:15
1988 491 216:00
1989 1203 269:46
1990 560 262:45
1991 2970 405:47
1992 2738 645:00
1993 4438 397:58
1994 4293 286:00
1995 960 224:45
1996 36823 328:00
1997 1148 356:45
1998 1739 339:30
1999 1764 267:15
2000 79 261:30
2001 3352 524:35
2002 7039 526:15
2003 4688 567:15
2004 3532 455:05
2005 11512 601:15
2006 2548 389:55
2007 1153 432:55
2008 877 525:55
2009 2975 399:05
2010 1367 249:40
2011 7500 319:15
2012 1332 231:35
2013 12047 270:55
2014 419 291:35
2015 486 177:30
2016 255 230:15
2017 245 250:05
2018 1080 318:16
2019 991 584:19
2020 969 587:17
2021 1400 646:27
 
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