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The smallest of the four species is the fairy prion (P. turtur), about 20 cm (8 inches) long; the largest is the broad-billed prion (P. forsteri) at about 27 cm. Most of the prions breed in burrows on Antarctic and sub-Antarctic islands. The broad-billed prion is more northerly in distribution, breeding on islands located between 35° and 60° S. A related bird, the...
...however, they become much more active at night, foraging in and around their burrows and interacting with other tuataras. While capable of digging their own burrows, tuataras often use those of the fairy prion (Pachyptila turtur), a burrow-nesting seabird. These settings provide tuataras with protection and food. Excreta from the birds supply a large arthropod...
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