RED-BELLIED WOODPECKER

Red-bellied Woodpecker
Copyright © 2005 Eric Secker

Conservation Concern: NONE

Population Trend: Substantial Increase
Credibility: Good

The Red-bellied Woodpecker is a common breeder in the CW Region. This cavity nester breeds in a variety of woodland habitats. This species appears to be expanding considerably in the Chicagoland area. BCN Census trends show a yearly increase of at least 7% to 9%. This species' success (compared to some other woodpeckers) may be partially related to its persistent, aggressive behavior towards European Starlings or to its selection of nesting sites away from competitive species.

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*:

29%

Technical Notes (1997-2004 Trend)

Sample Size (Indiv.): 253

Sample Size (Records): 191

AVG. YEARLY RATE OF CHANGE:
(including standard error)
9 to 49

GOODNESS OF FIT:
Chi-square: 132.92, df 146, p 0.7734
Likelihood Ratio: 138.32, df 146, p 0.6621
AIC: -153.68
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