Complex sentence: According to raptor researcher Dr Stephen Debus, this species did not suffer from eggshell thinning during the period of DDT use in Australia, though he believes it is possible that secondary poisoning may occur from rodenticides used during mouse plagues or from pesticides used during locust plagues.
Split into simpler sentences: According to raptor researcher Dr Stephen Debus, this species did not suffer from eggshell thinning during the period of DDT use in Australia. It is possible that secondary poisoning may occur from rodenticides used during mouse plagues or from pesticides used during locust plagues.