Euparkeria capensis

They are nocturnal.

URI: http://www.wikidata.org/entity/Q309179
Definition: animal behavior characterized by activity during the night and sleeping during the day

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EOL has data for one attribute:

behavioral circadian rhythm
- URI: http://purl.obolibrary.org/obo/VT_0001502
- Definition: Any measurable or observable behavioral characteristic related to a daily biological activity cycle.
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nocturnal
- URI: http://www.wikidata.org/entity/Q309179
- Definition: animal behavior characterized by activity during the night and sleeping during the day
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