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Thorny devils have a “false head” on their shoulders. Thorny devils are active in the autumn (March, April, and May) as well as the later winter through early summer (August – December), during which they mate and lay eggs.ĩ. They are almost completely inactive during the hottest summer months (January and February) and the coldest winter months (June and July), when they take refuge in underground burrows. Thorny devils have a bimodal seasonal pattern of activity. Thorny devils don’t like extreme hot or cold. In the cool morning, thorny lizards are a drab olive-brown and get lighter as the temperature climbs.Ĩ. They undergo this color change daily as the sun rises and they become more active. In warm weather, the lizards are usually pale yellow and red, but they can change rapidly to darker colors in cold weather or when alarmed. Individual thorny devils tend to have specific defecation sites away from their basking and feeding sites, and they may return to the same site for several days.ħ. They crumble easily to reveal the exoskeletons of their ant prey. Thorny devil droppings are glossy, black prolate spheroids. Presumably, their jerky movements and frequent freezing in place helps conceal them if a predator spots them out in the open.Ħ.
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This characteristic slow, shaky movement appears very deliberate. The thorny lizard’s unusual gait entails walking slowly, stopping often, and rocking back and forth. Thorny devils have another defense mechanism in which they inflate their chests with air to make themselves bigger and harder for a predator to swallow.ĥ. They can puff themselves up to appear bigger.
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