BCNBIRDS.ORG
       
COMMON GRACKLE

Preferred habitats include open shrublands, forest edges, and marshland edges with shrubs. BCN trends, although not statistically significant, may indicate that this species is fairly stable in our area. Sizeable populations in urban areas and agricultural areas are poorly represented by BCN Survey point counts which are usually located in preserved areas. Photo: © Gregg Williams

COMMON GRACKLE  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

    Annual Change Pct. Error      
  None Noted   309   1372   Normal*   -2% +/-4%      

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Uncertain

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1999-2007 TREND - Point Counts

 

 

 

 

 

 

 

 

COMMON GRACKLE

 

 

 

 

    Goodness of Fit
Chi-Square: p= 0
     

 

 

 

 

 

 

 

 

Fails

 

 

 

    model fits if p >0.05 (model
estimate is not significantly
dif. from observed counts)
     
           

 

     
Copyright © 2008 Audubon - Chicago Region & Bird Conservation Network