"If you are aware of the actual nest location, it is best to approach it on a path which would lead past the nest. When you are adjacent to the nest, you should turn at right angles to your path of travel, walk directly to the nest and band the nestlings. Once you have banded the nestlings, retrace your steps to your original line of travel. On the return trip from the nest, sprinkle your trail with liberal quantities of crystals. When you reach your original trail, you should again turn at right angles and continue in your original direction of travel ... Thus any predator who picks up and follows your original trail would be discouraged from turning off and following your side trail to the nest. He would be more likely to continue following your trail in your original direction of travel."