CHESTNUT-SIDED WARBLER

Chestnut-sided Warbler
Copyright © 2005 Jerry Kumery

Conservation Concern: NONE

Population Trend: Substantial Decrease
Credibility: Mod. Poor

The Chestnut-sided Warbler is a rare breeder in the CW Region. Breeding habitat includes open forests with dense understory, forest edges, and dense shrublands. This species' song may be frequently confused with other more common warbler species. BCN eBird data is too sparse to produce reliable trends, but short term data still shows a significant decrease during the past eight years. Removal of invasive shrubs may have a very sizeable negative impact on this species, but more study is needed.

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*:

-60%

23%

Technical Notes (1997-2004 Trend)

Sample Size (Indiv.): 12

Sample Size (Records): 9

AVG. YEARLY RATE OF CHANGE:
(including standard error)
-88 to -32

GOODNESS OF FIT:
Chi-square: 9.92, df 10, p 0.4472
Likelihood Ratio: 9.80, df 10, p 0.458
AIC: -10.2
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