It has a low rate of fruiting, with less than 1% of flowers developing into follicles, and more than half of the inflorescences failing to form any follicles at all. Seed survival rates are similarly low. Department of Environment and Conservation. More than half of a plant's seed crop may be lost to the larvae of moths and weevils, which burrow into the cobs to eat the seeds and pupate in the follicles; and further seed losses are caused by granivorous birds such as cockatoos, which break off the cobs to eat both the seeds and the insect larvae.