Prepare the vegetables and ranch dip. Cut the celery into sticks and slice the cucumbers and radishes. Mix Hidden Valley Ranch dip mix with sour cream according to the package directions. Hollow out the orange bell pepper to hold the dip.
Spread the loose green lettuce around the 15-inch round serving platter.
Arrange celery sticks in a fan shape around the platter. Trim some ends to a point to fill gaps along the curve.
Arrange the baby carrots just inside the celery, following the feather shape.
Place the orange bell pepper filled with ranch dip near the bottom center of the platter.
Layer overlapping cucumber slices above the bell pepper to build up the turkey's body and support the radishes.
Tuck sliced radishes around the cucumbers.
Choose a cucumber slice for the turkey's head. Add sliced black olives for eyes, a triangle of yellow cheese for the beak, and a small oval of salami for the wattle.
Cut feet from yellow cheese and place them below the body. Slit yellow bell pepper rings, gently fan them open, and trim them to fit around the turkey's feathers.