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Wrybill nests are just a shallow scrape in stony riverbeds. The young are similar in colour and shape to the surrounding stones, which helps prevent predators such as harriers and gulls from spotting them. However, they are vulnerable to introduced predators such as stoats, which hunt by smell and sound as well as by vision.
Te whakamahi i tēnei tūemi
Reference: 10039965
by M. F. Soper
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