WILLOW FLYCATCHER

Willow Flycatcher
Copyright © 2005 Eric Secker

Conservation Concern: 7PIF, WL-Y

Population Trend: Substantial Decrease
Credibility: Very Good

The Willow Flycatcher is a fairly common statewide breeder, but less abundant to the south. Preferred habitat includes open shublands with tall bushes and willows and bushes along marshland edges. BCN Census trends show relatively large annual decreases for this species. Short-term indicate at least a 4% annual decrease. Long-term trends estimate a 3% annual decrease. This species is fairly 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*:

-12%

-3%

Technical Notes (1997-2004 Trend)

Sample Size (Indiv.): 435

Sample Size (Records): 260

AVG. YEARLY RATE OF CHANGE:
(including standard error)
-20 to -4

GOODNESS OF FIT:
Chi-square: 300.81, df 274, p 0.1276
Likelihood Ratio: 290.08, df 274, p 0.2413
AIC: -257.92
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