frilled lizard
US /ˈfrɪld ˈlɪz.ərd/
UK /ˈfrɪld ˈlɪz.ərd/

1.
a large, arboreal lizard native to northern Australia and southern New Guinea, known for the large frill of skin around its neck that it can flare out when threatened
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The frilled lizard flared its neck frill to scare off the predator.
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We saw a beautiful frilled lizard climbing a tree in the rainforest.