BCNBIRDS.ORG
       
BLUE JAY

The Blue Jay is a common statewide breeder. Blue Jays often nest in woodlands, mixed forests, or forest edges with mast-producing trees (usually oaks). Nests may be placed in forks of trees or dense shrubs. BCN eBird data indicates that this species has decreased significantly. Analyses seem to support the belief that significant decreases were due to the effects of West Nile Virus. Photo: © Eric Secker

BLUE JAY  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

    Annual Change Pct. Error      
  None Noted   354   1453   Normal*   -8% +/-3%      

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Moderate Decline

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1999-2007 TREND - Point Counts

 

 

 

 

 

 

 

 

BLUE JAY

 

 

 

 

    Goodness of Fit
Chi-Square: p= 0.0247
     

 

 

 

 

 

 

 

 

Fails

 

 

 

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

 

     
Copyright © 2008 Audubon - Chicago Region & Bird Conservation Network