Complex sentence: Because it feeds in flight, the Storm Petrel is less affected by oil pollution than other seabirds, and may be able to use its good sense of smell to avoid slicks, although a large spill near a breeding colony could have serious consequences.
Split into simpler sentences: Because it feeds in flight, the Storm Petrel is less affected by oil pollution than other seabirds. It may be able to use its good sense of smell to avoid slick, although a large spill near a breeding colony could have serious consequences.