YELLOW WARBLER

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Yellow Warbler
Copyright © 2005 Eric Secker

 Conservation Concern: NONE

Population Trend: Decreasing
Credibility: Good

The Yellow Warbler is a common, locally abundant, statewide breeder, but less common to the south.  Preferred habitat includes moderate to dense, often isolated, shrublands and tracts of willows along marshes and streams.  BCN Census trends estimate a short-term decrease of 3% and a long-term decrease of 1% annually.

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*:		  
  -3%   -1%  
   
   

 

 

Technical Notes (1997-2004 Trend)

Sample Size (Indiv.): 560

Sample Size (Records): 360

 

AVG. YEARLY RATE OF CHANGE:
(including standard error)
-10 to 4

  GOODNESS OF FIT:
Chi-square: 338.13, df 364, p 0.8309
Likelihood Ratio: 346.48, df 364, p 0.7374
AIC: -381.52
NOTE: (model fits if p values are above 0.05)

Download Table of All Observations

 
 

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Copyright © 2005 Audubon - Chicago Region & Bird Conservation Network

 
 
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