Kinyongia vanheygeni, the Poroto single-horned chameleon or Van Heygen's chameleon, is a species of chameleon, a lizard in the family Chamaeleonidae.

Kinyongia vanheygeni is native to highland forests in the Rungwe and Poroto Mountains of southern Tanzania and northern Malawi.

[1][2] Kinyongia vanheygeni was named after Belgian herpetologist Emmanuel Van Heygen,[3] who took the first pictures of it in the wild.

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