Before a full portrait, do two focused texture studies — one furry mammal and one bird with distinct feathers. These are not full pictures; they're close-up patches of texture, each about 4×4 inches. Use zoomed-in photo references — the more close-up the photo, the better. You need to see individual hairs and feather barbs clearly.
Toned gray or tan paper, colored pencil set including a white pencil, pencil sharpener, two close-up photo references (one fur, one feathered). Each study approximately 4×4".
Find very close-up photo references for each texture. Google '[animal name] fur macro photo' or '[bird name] feathers close up.' You need to see individual hairs and feather barbs, not a full-body shot.
Work on toned gray or tan paper. The mid-tone handles the middle value automatically. You only add darks for shadows and lights for highlights — faster and more dynamic than white paper.
For fur: use short, quick flicking strokes in the direction hair grows. Layer dark colors first (the shadow between hairs), then lighter body colors on top. Finish with white pencil for the brightest individual highlight hairs.
For feathers: draw the central shaft (rachis) first as a fine line. Add long, slightly curved strokes fanning outward from it. Individual feathers overlap — make some edges sharp, others soft and blending into the next feather.
Compare to your reference after each layer. What color variation is present in the real texture that you haven't captured? What is the darkest dark? The lightest light?
The direction of your pencil strokes is everything. Strokes that go against the natural grain of fur or feathers will look flat and artificial immediately. When in doubt, zoom in on your reference until you can clearly see which direction each individual hair or feather barb points — then follow that exactly.