The iconic platypus is regarded as near-threatened, with numbers declining across Australia. Photo: Bianca De Marchi/AAP PHOTOS

Momentum is building for a truly national ban on a popular yabby trap which drowns any air-breathing animal that can fit inside it, including the vulnerable platypus.

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So-called opera house traps are a collapsible net with a funnel-shaped entry on each side.

Neil Andison, who works as a platypus guide in Maleny on the Sunshine Coast hinterland, has spent a decade writing to politicians across Queensland in an attempt to highlight the urgency of the issue.

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