Complex sentence: Rothenberg then discusses the Thayers' account of the wood duck, which Rothenburg calls "our most garishly colored duck", explaining that the Thayers believed they, "trained as artists", had seen what earlier observers had missed, that Rothenberg, 2011.
Split into simpler sentences: Rothenberg then discusses the Thayers' account of the wood duck, which Rothenburg calls "our most garishly colored duck". He explains that the Thayers believed they, "trained as artists", had seen what earlier observers had missed: Rothenberg, 2011.