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Status and trends in demography of northern spotted owls, 1985-2003.
Wildlife Monographs: 163
Consisted of data from 14 study areas (including 8 NWFP monitoring areas)
Indicated Spotted Owl populations, on average, declined by a rate of 3.7% per year 1987-2003
Populations were declining on 9 of 13 study areas, 1 study area had insufficient data to derive estimates
5 of the 8 monitoring areas showed population declines. Average decline 2.4 %/year
Cle Elum population growth rate - 6.2% per year
2009 Meta-analysis draft in preparation, to be released late summer, 2009
Notes:
Results from 2004 meta-analysis