First I study Magdalena's original rugs, particularly the design I'm ready to hook. Although I've never seen one in person there are photos one could find on line or from books. Take for example, these two Olde Ducks rugs hooked by Magdalena.
Another example is Magdalena's Eagle which also appears in the book.
Here is a closeup photo I took of my rug where you can see the different wool at neck. It is little details like that you can see with the assistance of the booklet and studying Magdalena's rugs.
Since I love crows decided to design my own Magdalena Style Crow. Magdalena used red for legs, noses and eyes on animals ~ kind of her signature. She also would hook a berry at a crow's mouth and or beak.
Click on the BOOK link above to purchase the booklet as it is a great reference for Magdalena rugs. It isn't a 'tutorial' book as that part is left to the rug hooker's discretion to get his/her own rhythm. But the photos of the original Magdalena's and photos of Evelyn's replications and information makes for a perfect reference book. Good luck and hope I've been able to help.