Rufous morph of Black Butcherbird quesiton.

[Joseph Morlan <>]

I understand the rufous morph of the Black Butcherbird occurs only in the
race Cracticus quoyi rufescens.  What is not clear is whether this morph is
confined to juveniles/immatures or if it is retained until adulthood.  One
source (Simpson & Day 7th edition) mentions in passing that the species may
breed in brown plumage.  If so, that suggests to me that the rufous morph
may be permanent.

Do rufous morph Black Butcherbirds turn black as adults or not?  What is
the evidence that they do?

Thanks in advance.  
-- 
Joseph Morlan, Pacifica, CA
"It turns out we're very good at not seeing things" - Jack Hitt

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