AMERICAN GOLDFINCH

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American Goldfinch
Copyright © 2005 Eric Secker

 Conservation Concern: NONE

Population Trend: Stable
 Credibility: Good

The American Goldfinch is a common breeder throughout the state.  This species appears to be very stable in the CW Region.  Note the significant decrease in 2003 which may be attributed to the spread of West Nile Virus.

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*:		  
  1%   2%  
   
   

 

 

Technical Notes (1997-2004 Trend)

Sample Size (Indiv.): 2027

Sample Size (Records): 759

 

AVG. YEARLY RATE OF CHANGE:
(including standard error)
-4 to 7

  GOODNESS OF FIT:
Chi-square: 1096.38, df 717, p 0
Likelihood Ratio: 1174.87, df 717, p 0
AIC: -259.13
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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