Our ichneumon cards contain approximately 2000 ichneumon wasps, each in various stages of development. By the time you receive your delivery, the first ichneumon wasps will have just started hatching. Once the next delivery arrives in a fortnight, all the ichneumon wasps from the first delivery will have hatched and will be busy hunting for moth eggs. By shipping a new batch of moth wasps to your door every fortnight, we guarantee the best results and the highest quality of beneficial insects.