Definition: | The name of the bird species that was observed | The number of birds observed in 1979 | The number of birds observed in 1980 | The number of birds observed in 1981 | The number of birds observed in 1990 | The number of birds observed in 1991 | The number of birds observed in 1992 | The number of birds observed in 1997 | The number of birds observed in 1998 | The number of birds observed in 1999 | The number of birds observed in 2000 | The number of birds observed in the first 2001 survey | The number of birds observed in the second 2001 survey | The number of birds observed in 2002 | The number of birds observed in 2003 | The number of birds observed in 2004 | The number of birds observed in 2005 | The number of birds observed in 2006 | The number of birds observed in 2007 | The number of birds observed in 2008 | The number of birds observed in 2009 | The number of birds observed in 2010 | The number of birds observed in 2011 | The number of birds observed in 2012 | The number of birds observed in 2013 | The number of birds observed in 2014 | The number of birds observed in 2015 | The number of birds observed in 2016 | The number of birds observed in 2017 | The number of birds observed in 2018 | The number of birds observed in 2022 | The number of birds observed in 2023 | The number of birds observed in 2024 |