frill

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Frilled lizard (Chlamydosaurus kingii) with its frill extended in defensive posture.

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frill

anatomy

Learn about this topic in these articles:

characteristics of dinosaurs

In dinosaur: Ceratopsia
This neck shield, or frill, resulted in the longest head that ever adorned any land animal; the length of the Torosaurus skull was almost 3 metres (10 feet), longer than a whole adult Protoceratops.
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frilled lizards

In frilled lizard
Normally, the neck frill, often as wide as the lizard is long, lies like a cape over the shoulders. When the lizard is irritated or threatened, it can raise the frill perpendicular to its body, enabling it to surprise its enemies by suddenly displaying a head several times…
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