 90 million flies would be impossible to count. So we do it by weight. We know that a pupae weighs about 0.01 grams and so 100,000 pupae is about a kilogram. So we just multiply it out and we know that a million flies is about 10 kilograms. So the particular strain of fruit fly that we breed at the Western Australian facility has a unique gene that means only the males will survive above a certain temperature. So once we harvest the eggs we heat them in a water bath up to a temperature about a high 30 degree Celsius range and at that point we know that only the male eggs survive. So then when we hatch the eggs and they form pupae we've got males only. Then we will take those pupae, we'll put them in an X-ray machine and that ensures that those males are then sterile and we can release them into the wild. So you might have noticed the low-flying plane over the adelaide suburbs recently that is part of our fruit fly response and is releasing the male fruit flies into the environment. We receive the pupae from the facility in Western Australia and hatch them out here in adelaide into adult flies. We then chill them down, load them onto the plane and release them into the warm air. When they feel the warm air they start to liven up and they'll find a tree to settle in. So if you do say that plane we'd love you to take a photo and tag us on Facebook or Twitter.