NORTHERN HARRIER

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Northern Harrier
Copyright © 2005 Eric Secker

Conservation Concern: 3 State Endangered

Population Trend: Poorly Known
Credibility: Very Poor

The Northern Harrier is a very rare breeder in the CW Region.  Breeding habitat includes large areas of moist grassland and/or marshes.  This species has decreased substantially during the past century due to habitat loss.  Breeding birds have been encountered at quite a few locations in the CW Regions over the years, but most of the populations in locations with less than 500-100 acres of grassland have not been sustainable.

Trend Level

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1997-2004 Trend
Point Count Data
1988-2004 Trend*
All Observation Types

View the Graph for this Species
*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.): 1

Sample Size (Records): 1

 

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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