Swamp Harrier

Circus approximans

The swamp harrier, also known as the Australasian marsh harrier or Australasian harrier, is a large, slim bird of prey widely distributed across Australasia. In New Zealand, it is also known by the Māori name kāhu. It arrived in New Zealand within the last 700 years, replacing the larger species, the extinct New Zealand endemic Eyles's harrier.

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Low-Light Telephoto Systems

Identifying specific features of the Swamp Harrier requires high-contrast magnification. Check out the top-rated 8x42 optics.

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📘 ID Reference Card

Raptor ID Pocket Reference

Compact pocket-card format — print & fold. Covers plumage, field marks, and song mnemonics.

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