HENSLOW'S SPARROW

Henslow
Copyright © 2005 Eric Secker

Conservation Concern: 4 State Threatened

Population Trend: Substantial Increase
Credibility: Very Good

The Henslow's Sparrow is a rare to uncommon breeder in the CW Region. Breeding habitat includes mature, unburned grasslands. Sizeable populations are still limited to large grasslands, but numbers of this species have greatly improved during the past five to ten years. Short term trends show a sizeable yearly increase. This species is well sampled by the BCN Census.

Trend Level

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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*:

14%

Technical Notes (1997-2004 Trend)

Sample Size (Indiv.): 329

Sample Size (Records): 201

AVG. YEARLY RATE OF CHANGE:
(including standard error)
0 to 15

GOODNESS OF FIT:
Chi-square: 216.56, df 227, p 0.6794
Likelihood Ratio: 245.24, df 227, p 0.1934
AIC: -208.76
NOTE: (model fits if p values are above 0.05)

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