An increase of the number of birds in your yard may be an indication of armyworms. The earlier you treat the problem, the easier it is to control and less damage a lawn will sustain.
[header] How to control armyworms [title] Look for early signs. [step] Because they feed at night, you may not see the caterpillars right away. Brown spots on your lawn are often the first sign that you have an armyworm problem.