Unfortunately I don't have a list on hand of all the exercises, although I'm sure you could compile your own by going through the homework sections of each lesson you've completed.

When it comes to the actual plant/insect/animal/object/vehicle constructions, while I don't strictly demand that students include those in their warmups, this is mainly out of feasibility. I prefer to leave the door open in that regard, rather than creating a clear separation between the those constructions and the things that are more obviously exercises (everything from lessons 1 and 2, the challenges, lesson 3's leaves and branches, etc). Constructional drawings certainly are exercises - or rather, they're a singular exercise in which we take an object of whatever sort, break it down into simple forms, and push our brain to consider how those forms relate to one another in 3D space. What differs is the subject matter, but it is the actual process of "solving" the 3D puzzle that is the actual exercise in question.

Ultimately I leave it to students to work that into their own schedules, and leaving that door open but not specifically stamping them as exercise or not allowing students to consider how they might integrate them into their schedules themselves.