BELL'S VIREO

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Bell
Copyright © 2005 Eric Secker

 Conservation Concern: 5PIF, FW

Population Trend: Poorly Known
Credibility: Very Poor

The Bell's Vireo is a rare breeder in the CW Region.  Nests are often located in large thickets or hedgerows in open shrublands or grasslands.  Unfortunately, BCN eBird data for this species is very sparse, due partially to the fact that the CW Region is on the northern fringe of this species range.  Declines from other data sources have been severe enough to place this species on FW and PIF watchlists.

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*:		  
  ----   9%  
   
   

 

 

Technical Notes (1997-2004 Trend)

Sample Size (Indiv.): 5

Sample Size (Records): 4

 

AVG. YEARLY RATE OF CHANGE:
(including standard error)
0 to 0

  GOODNESS OF FIT:
------
------
------
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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