BROAD-WINGED HAWK

 SPECIES INDEX  |  HOME    

Broad-winged Hawk
Copyright © 2005 Eric Secker

 Conservation Concern: NONE

Population Trend: Poorly Known
Credibility: Very Poor

The Broad-winged Hawk is a rare breeder in the CW Region.  This species usually nests in large forests with dense understory.  Accurate short term trends cannot be calculated due to the very small sample size, but long term trends seem to indicate that this species has declined noticeably during the past fifteen years.

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*:		  
  23%   -7%  
   
   

 

 

Technical Notes (1997-2004 Trend)

Sample Size (Indiv.): 3

Sample Size (Records): 3

 

AVG. YEARLY RATE OF CHANGE:
(including standard error)
-112 to 158

  GOODNESS OF FIT:
Chi-square: 4.46, df 4, p 0.3475
Likelihood Ratio: 3.37, df 4, p 0.498
AIC: -4.63
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