Franšais

 

Indicators of the average population status of characteristic species (Prairies)

Line graph depicting the percent change in population size of various bird guilds in the Prairies since 1970
Indicators of the average population status of characteristic species (Prairies)
Year All birds Other water birds Waterfowl Grassland birds Forest birds
1970 0 0 0 0 0
1971 0 -1 -12.2 0 6.4
1972 -1.3 -4.5 -15.9 -1.7 10.3
1973 -2.9 -2.2 -24.6 0.9 11.8
1974 1.1 2.7 1.7 -3.3 9
1975 5.5 13.1 7.9 -2.2 12.5
1976 6 15.7 -0.3 -1.9 18.6
1977 -1.6 -4.6 -16.5 -4.1 20.4
1978 -4.4 -11.7 -19.2 -9.3 28.6
1979 1 3.5 -1.7 -13.2 28.7
1980 -1.1 -6.9 -7.4 -11 31.3
1981 -4.6 -14.5 -20.5 -9.7 33.9
1982 -4.2 -13.6 -16.1 -11.9 33.5
1983 -3.7 -7.6 -16.2 -13.9 34.2
1984 -9.3 -11.7 -33.5 -17 45.6
1985 -7.2 -9.3 -25.1 -15.9 44.4
1986 -6.5 -8.3 -28.7 -16.8 50.4
1987 -7.2 -13 -33.7 -16.5 55.8
1988 -10.9 -16 -38.5 -18.5 48.9
1989 -13.7 -21.1 -45.8 -20 60.5
1990 -7.8 -15.6 -29.4 -19 62.3
1991 -9 -16.3 -36.2 -20.1 69.7
1992 -4.9 -12.5 -23.4 -21 67.5
1993 -10.9 -21.3 -38.9 -21.3 64.7
1994 -1.9 -9.3 -19.9 -23.9 72
1995 -0.2 -8.6 -5 -26.3 71
1996 3.1 -7.8 16.6 -28.7 79.5
1997 6 -0.4 23.7 -29.5 80.3
1998 0.5 -13.8 -2.6 -28.2 90.9
1999 5.3 3 12.9 -30 91.9
2000 0.5 -6 0.1 -31.3 98.2
2001 -6.9 -18.7 -13.4 -36.8 103.3
2002 -15.2 -24.7 -41.5 -36.8 99.2
2003 -3 -22.4 2.2 -34.3 112.9
2004 -8.7 -19.8 -24.1 -35.5 138.3
2005 -2.3 -1.9 -6.6 -34.2 118.8
2006 6.2 4.2 25.3 -32.8 115.2
2007 8.7 8.9 32.7 -33.9 124.3
2008 0.7 -5.8 10.8 -35.9 120.4
2009 -1.8 -14.6 1.3 -36.3 126.6
2010 -2.3 -5 -13.8 -37.6 140.8

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