box turtle
US /ˈbɑːks ˌtɜːr.tl̩/
UK /ˈbɑːks ˌtɜːr.tl̩/

1.
a North American turtle that can completely enclose itself in its shell
:
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We saw a box turtle slowly crossing the road.
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The box turtle pulled its head and limbs into its shell when approached.