The South Island oystercatcher (Haematopus finschi), also known as the South Island pied oystercatcher or SIPO, is a prominent shorebird endemic to New Zealand. The indigenous Māori name for the bird is tōrea. Despite the name, they rarely eat oysters. Instead, their diet mainly consists of earthworms, insects, and molluscs like cockles and mussels. SIPOs are strictly monogamous, often returning to the exact same nesting territory and partner year after year. In winter, most of the population migrates to North Island estuaries and harbours.
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