WOOD THRUSH

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Wood Thrush
Steve Maslowski / USFWS

Conservation Concern: 5PIF, WL-Y, FW

Population Trend: Substantial Decrease
Credibility: Good

The Wood Thrush is an uncommon, locally fairly common, statewide breeder.  Preferred habitat includes woodlands with understory and dense shrublands with canopy.  Long-term trends estimated a 4% annual decrease.  Short-term trends have a somewhat larger range of error, but estimate a 12% annual decrease.  The Wood Thrush has been shown to be one of the (desirable) species most negatively impacted by current restoration practices in the CW Region - especially buckthorn and honeysuckle removal, without sufficient reintroduction of native understory (although it is not believed to be a productive breeder in our region's fragmented forests).

Trend Level

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1997-2004 Trend
Point Count Data
1988-2004 Trend*
All Observation Types

*Data gathered using a assortment of sampling methods  - for casual inferences only
  Avg. Yearly
Rate of Change:

The vertical axis numbers represent an index of the population change.

Note that the scales may vary between graphs.

Avg. Yearly
Rate of Change*:
 
  -11%   -4%  
   
   

 

 

Technical Notes (1997-2004 Trend)

Sample Size (Indiv.): 156

Sample Size (Records): 132

 

AVG. YEARLY RATE OF CHANGE:
(including standard error)
-26 to 4

 GOODNESS OF FIT:
Chi-square: 132.07, df 139, p 0.649
Likelihood Ratio: 136.45, df 139, p 0.5454
AIC: -141.55
NOTE: (model fits if p values are above 0.05)

Download Table of All Observations

 

 

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