Assertion: rattlesnake's pit | /r/HasProperty | located behind each nostril
Facets:
Source sentences:
text: This means that they have a heat sensing pit (loreal pit) located behind each nostril that can detect differences in temperature, sometimes differences that are only a fraction of a degree apart.
text: Rattlesnakes have two well-defined pits located under their nostrils, which allow them to sense heat and hunt warm-blooded prey.