Wilson’s storm-petrel makes nests in burrows or rock crevices, and tends to breed together in loose colonies. The breeding season is around November to December. Each pair lays a single egg, which hatches after an incubation period of around 43 days (2).
The diet of Wilson’s storm-petrel is mostly based on planktonic crustaceans, especially krill, but may also include fish, squid and other molluscs. This species can detect prey by smell, and is known to search out and follow fishing trawlers (2) (6).
Wilson’s storm-petrel uses a wide range of vocal signals to communicate. It is a strong flier and an excellent swimmer, but cannot sustain itself for more than a few steps when walking on land (2).
Due to its fragility on land, Wilson’s storm-petrel only comes to shore at night, to avoid predators such as gulls and eagles. When threatened, Wilson’s storm-petrel may squeak and eject an oily liquid from the stomach in defence (2) (6).