SWAMP SPARROW

 SPECIES INDEX  |  HOME    

Swamp Sparrow
Copyright © 2005 Eric Secker

 Conservation Concern: NONE

Population Trend: Stable
 Credibility: Mod. Poor

The Swamp Sparrow is an uncommon breeder in the CW Region.  Breeding habitat includes marshland edges with tall vegetation and other grassy areas near water.  Trends show that this species is fairly stable in the Chicago area.  This species is not adequately monitored by the BCN Census and its rather plain song may be frequently ignored by monitors.

Trend Level

Interpreting the Data | Analysis Methods | Disclaimer | Contact Us

 

 
   
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%   1%  
   
   

 

 

Technical Notes (1997-2004 Trend)

Sample Size (Indiv.): 62

Sample Size (Records): 49

 

AVG. YEARLY RATE OF CHANGE:
(including standard error)
-23 to 21

  GOODNESS OF FIT:
Chi-square: 43.79, df 51, p 0.7528
Likelihood Ratio: 44.00, df 51, p 0.7456
AIC: -58
NOTE: (model fits if p values are above 0.05)

Download Table of All Observations

 
 

Project Affiliates and Sponsors:

Copyright © 2005 Audubon - Chicago Region & Bird Conservation Network

 
 
HOME  |  SPECIES INDEX  |  INTERPRETING THE DATA  |  ANALYSIS METHODS  |  DISCLAIMER  |  CONTACT US
     
  Site designed by - Piazza Design