Heiga Manschinger

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s u g g e s t s t h a t t he cock p l u m a g e in t he se b i rds is i n d e p e n d e n t of t h e gonada l h o r m o n e s , a n d is p r o b a b l y u n d e r t h e cont ro l of t h e cycl ing p i t u i t a r y ; obv ious ly t he h y p o p h y s i s in t he se f inches, n o t un l ike t h e Afr ican weave r f inches, m a i n t a i n s i ts cyclic a c t(More)
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