I would make a small skinner blend (try using two small triangles of clay, and just keep mixing them with the pasta machine; use your finger to keep the colors from widening on the rollers), and then take a small shape of clay (say a wing), and cut a piece of the colored sheet just big enough to drape over it. Trim it to fit, or tuck the edges to the back, or both. Then texture as you normally would.
Another way to try blending would be to bake a basic bird body or wing shape, a little smaller maybe than you want the finished shape to be.
Press two colors of clay on the shape (thin sheets) slightly overlapping where you want them to blend. Then use a tool (a blunt needle or something similar) and drag the upper color over into the lower color area. Use short, firm strokes; if you do this over a baked undersurface, you'll be able to use a lot of pressure and get a good blend. But I really think a skinner blend will work better.
Look also for "bullseye" cane instructions; you can slice a bullseye cane in half to get a shape that you can then distort to get a blend down the length of a feather,for example...
Play with it; use two colors which, when blended together, make a pleasing mix. Taht way you're not wasting clay to practice with.