Franšais

 

Indicators of the average population status of characteristic species (West Coast and Mountains)

Line graph depicting the percent change in population size of various bird guilds in the Western Boreal since 1970 or 1990
Indicators of the average population status of characteristic species (West Coast)
Year All birds Pacific Coast birds Other water birds Waterfowl Forest birds Shrub and forest-edge birds Aerial insectivores Grassland birds
1973 0 0 0 0 0 0 0 0
1974 -1.9 -4.1 -1.1 0.8 -2.2 1.2 -2.5 -5.8
1975 0.5 -5.8 1.7 2.5 1.3 4.5 -5 -2.5
1976 2.9 -2.5 5.4 4.8 3.5 6.7 -2.8 -1.2
1977 1.1 -2.9 -0.3 2.9 2.6 4.7 -3.4 -3.2
1978 -0.3 -7.5 1.9 5.8 -0.6 3.4 -4.7 -4.4
1979 1.3 -8 0.5 5.6 1.7 8.3 -6.9 -8.1
1980 1 -10.3 0.4 3.8 2.1 2.9 -9.2 -7.6
1981 -0.9 -8.8 0.2 5.6 1.1 1.9 -13.8 -10.8
1982 -3.4 -12.6 2.4 10.9 -4.4 1.2 -11.6 -12.7
1983 -3.7 -12.3 0.9 9.6 -2.5 2.1 -17.9 -12.8
1984 -1.9 -12.8 1.5 9.8 -0.9 5.1 -14.3 -12.7
1985 -4.2 -16.3 0.1 13.1 -3.2 2.2 -17.1 -18.6
1986 -2.5 -17 2.1 11.5 -0.7 3.4 -16.9 -16.5
1987 -2.2 -17.6 5.5 19.4 -0.2 0.2 -20.4 -18.3
1988 -3.7 -16.1 2.4 19.9 -1.3 -2.1 -24.1 -20.5
1989 -4 -20.1 -1.3 21 -1.5 -0.7 -25.4 -22.5
1990 -2.7 -20.4 -0.3 20.7 0.5 0.2 -23.4 -24.6
1991 -3.2 -20.4 2 20.7 -2.1 4.2 -22.5 -26.9
1992 -2.3 -20.8 5.1 28.2 -0.7 1.1 -24.7 -24.8
1993 -5.3 -21.5 2.2 27.1 -3.8 1 -27.7 -29
1994 -2 -21.5 4.8 29.3 2.5 -0.2 -29.2 -29
1995 -4.8 -24.5 5.2 30.8 -1.3 -3.6 -30.4 -28.3
1996 -4.4 -24.3 4.9 37.4 -0.7 -4.8 -31 -32.8
1997 -8.3 -27.8 5 36.7 -6.9 -6.3 -32.7 -32.2
1998 -6.7 -26.8 8.1 38.9 -5.5 -5.2 -33.2 -31.5
1999 -8.6 -29.9 7.4 44.7 -6.9 -6.6 -35.7 -32
2000 -10.4 -26.8 5.3 43.9 -8 -10.2 -38.5 -35.8
2001 -10.2 -29.5 7.6 46.1 -7.3 -11.2 -39.6 -37.8
2002 -10.4 -30.3 6.6 53.2 -7.9 -7.4 -40.6 -41.1
2003 -10.1 -30.4 7.9 60.3 -6.4 -11.3 -41.9 -40.6
2004 -11.4 -30.8 4.3 50.1 -8.3 -12.3 -41.3 -41.4
2005 -12 -32.9 10.6 57.6 -11.4 -12 -42.7 -41.3
2006 -11.9 -34.6 11.3 63.1 -11.1 -13.1 -42.6 -41.9
2007 -10.6 -36.2 12.5 71.9 -8.5 -13.1 -43.3 -42.7
2008 -11.1 -35 9.9 74.5 -9 -13.7 -43.9 -44.3
2009 -10.4 -35.4 13.8 82.9 -8.5 -14.8 -43.5 -45.3
2010 -9.3 -35.2 17.3 84 -7.4 -14.9 -45 -47.1

Return to previous page