Interesting observations.Well, when I see red I guess I think blood, ink, dyes, paint, yarn, certain fruits and nuts, etc. If we look at rose hips, flip them over, cut them open to expose the insides, then perhaps we have something that looks like the "Rubber ducky" (or is it Peking Duck showing off its spine?) in f76v. The head of the bird is a curiosity. I had assumed this was another representation of a spindle.
A typical rubber duck fan site:- http://www.duckplanet.com/
Rubber duck as archetypal 20th century icon:- http://interconnected.org/matt/culture/icon_01.html