A medium-sized petrel with a distinctive mottled belly. The name is descriptive. Grey above. White below. A grey breast band sits across the chest. Dark spotting covers the underparts. The belly looks as if it has been sprinkled with pepper. The bird is handsome. It is also declining. The two facts are not connected. Appearance does not dictate survival. Feeding focuses on fish and squid. Plucking occurs from the surface. Flight is low over the water. Rapid, bounding wingbeats drive movement. A mottled petrel in a storm is in its element. It rides the wind. It tilts from one gust to the next. It does not fight the weather. It uses it. Resistance is futile. Adaptation is key. Flight is erratic and gadfly-like. Steep banks alternate with sudden changes of direction. Speed is high. Agility is greater. Tracking is difficult. Even experienced seabirders lose it in the swell. The bird disappears into the whitecaps. Reappearance is unpredictable. Observation requires patience and luck. Both are in short supply. Breeding takes place on remote islands. The burrow is dug into soft soil on a steep slope. A single white egg is laid. Both parents share incubation duties. The chick is fed on regurgitated squid oil. Fledging occurs at about three months. That is a long time to sit in a hole. Vulnerability is extended. Exposure is constant. In New Zealand, breeding occurs on Stewart Island and the subantarctic islands. The Antipodes. The Aucklands. Campbell. The population is small. The birds are vulnerable. One rat incursion could wipe out a colony. The risk is real. The consequence is total. Conservation relies on isolation. Isolation is fragile. Abundance was once high. Early settlers reported enormous flocks off the New Zealand coast. Then rats arrived on the breeding islands. The petrels declined. They are still declining. The trend is downward. The cause is clear. Introduced predators do not discriminate. They consume until nothing remains. The species name inexpectata means unexpected. Description came from a specimen collected in Tasmania. No one expected to find it there. It was a surprise. Not a pleasant one for the bird. Taxonomic history often involves such accidents. The name persists. The location was anomalous. The classification stuck. Migration is long-distance. Breeding happens in New Zealand. Wintering occurs in the North Pacific. Off Japan. Off Alaska. The equator is crossed twice a year. The bird does not seem to find this remarkable. Distance is routine. Navigation is innate. The journey is annual. The destination is fixed. Decline continues due to bycatch in longline fisheries. Thousands are caught each year in the North Pacific. Birds cannot breed fast enough to keep up. Each adult killed is a pair that fails to raise a chick. The math is simple. The outcome is grim. Conservationists work on solutions. Bird-scaring lines. Weighted hooks. Night setting. The petrel keeps declining anyway. Effort does not guarantee success. It only delays the end.