ORCHARD ORIOLE

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Orchard Oriole
Copyright © 2005 Eric Secker

 Conservation Concern: 5PIF, FW

Population Trend: Poorly Known
Credibility: Moderate

The Orchard Oriole is an uncommon to fairly breeder in the CW Region and common further to the south.  Breeding habitat includes open shrublands, grasslands with hedgerows, and savannas.  This species may be declining in other regions due to development and other factors, but BCN Census data shows that this species is on the increase in the Chicagoland area.

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*:		  
  35%   8%  
   
   

 

 

Technical Notes (1997-2004 Trend)

Sample Size (Indiv.): 46

Sample Size (Records): 35

 

AVG. YEARLY RATE OF CHANGE:
(including standard error)
-10 to 79

  GOODNESS OF FIT:
Chi-square: 33.33, df 38, p 0.6849
Likelihood Ratio: 31.60, df 38, p 0.7588
AIC: -44.4
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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