When you see all the crane flies bouncy around the lawn, that's the time to deal with it. go and squash them before they lay the eggs.
I don't do this, it's all part of life and something will eat the larvae. The more indiscriminate poisoning that goes on the more the balance is upset and one pest gains superiority
I totally agree Verdun.
We get the horrible things dancing round the bedroom every night..... what fun ! Any we don't catch dive bomb me after lights out ! This year has been the worst ever for them .....they are very good at finding cobwebs that I have missed though !