RING-NECKED PHEASANT

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Ring-necked Pheasant
Copyright © 2005 Jerry Kumery

 Conservation Concern: NONE

Population Trend: Substantial Decrease
Credibility: Good

The Ring-necked Pheasant is an uncommon breeder in the CW Region, fairly common further to the south.  Breeding habitat includes grasslands and agricultural areas.  This non-native species was introduced into the United States in the late 1800's.  They have declined substantially in the CW Region during the past twenty years.

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*:		  
  -18%   -10%  
   
   

 

 

Technical Notes (1997-2004 Trend)

Sample Size (Indiv.): 80

Sample Size (Records): 75

 

AVG. YEARLY RATE OF CHANGE:
(including standard error)
-35 to -1

  GOODNESS OF FIT:
Chi-square: 81.68, df 88, p 0.6691
Likelihood Ratio: 77.56, df 88, p 0.7793
AIC: -98.44
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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