The Opihi River flows through south Canterbury, in New Zealand's South Island. It has been identified as an Important Bird Area by BirdLife International because it supports breeding colonies of the endangered black-billed gull.
The banks of the river around the settlement of Waitohi were possibly the site of the first powered heavier-than-air flight on March 31, 1903, when pioneer aviator Richard Pearse is reputed to have got his home-made machine airborne several months before the Wright Brothers.
- "Opihi River". BirdLife data zone: Important Bird Areas. BirdLife International. 2012. Retrieved 15 November 2012.
- McDowall, R. M. (1990) New Zealand freshwater fishes: a natural history and guide. Heinemann-Reed, Auckland, 553 p.
- Environment Canterbury (2000). Opihi River Regional Plan Report R00/16. Environment Canterbury. ISBN 1-86937-392-8.
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