BARN SWALLOW

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Barn Swallow
Copyright © 2005 Eric Secker

 Conservation Concern: NONE

Population Trend: Decreasing
Credibility: Moderate

The Barn Swallow is a common statewide breeder that frequently nests under bridges, building ledges and overhangs, in caves, or along cliff edges - frequently near water.  They are often seen feeding over water or open fields and are easily detected.

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*:		  
  -6%   -1%  
   
   

 

 

Technical Notes (1997-2004 Trend)

Sample Size (Indiv.): 368

Sample Size (Records): 198

 

AVG. YEARLY RATE OF CHANGE:
(including standard error)
-19 to 6

  GOODNESS OF FIT:
Chi-square: 380.45, df 247, p 0
Likelihood Ratio: 366.12, df 247, p 0
AIC: -127.88
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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