Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 12 5:30
1980 0 2:00
1981 564 143:25
1982 398 100:04
1983 237 76:05
1984 1022 157:55
1985 769 193:05
1986 1750 180:40
1987 929 99:15
1988 693 216:00
1989 1357 269:46
1990 1393 262:45
1991 1552 405:47
1992 1312 645:00
1993 1622 397:58
1994 1108 286:00
1995 742 224:45
1996 1706 325:15
1997 997 356:45
1998 1107 339:30
1999 497 267:15
2000 852 261:30
2001 1796 524:35
2002 1541 526:15
2003 1424 567:15
2004 1230 455:05
2005 1275 601:15
2006 1219 389:55
2007 1281 432:55
2008 1235 525:55
2009 945 399:05
2010 592 249:40
2011 725 319:15
2012 565 231:35
2013 1408 270:55
2014 595 291:35
2015 339 177:30
2016 935 230:15
2017 349 250:05
2018 1065 318:16
2019 1156 584:19
2020 1179 587:17
2021 1760 550:12
 
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