BCNBIRDS.ORG
       
COMMON TERN

The Common Tern has only one known colony in the Chicago area, within the Naval Station Great Lakes complex.  Cooperative management helps protect these birds from predators, invasive species, and water level fluctuations.

COMMON TERN  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

    Annual Change Pct. Error      
  Threatened, SCC   1     Poor   --- +/----      

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IL-ENDGR

 

 

 

 

 

 

 

 

 

Uncertain

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1999-2007 TREND - Point Counts

 

 

 

 

 

 

 

 

COMMON TERN

 

 

 

 

    Goodness of Fit
Chi-Square: p=
     

 

 

 

 

 

 

 

 

 

 

 

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

 

     
Copyright © 2008 Audubon - Chicago Region & Bird Conservation Network