 |
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| massasauga (Sistrurus); pygmy rattlesnake (Sistrurus) | |||
| ground rattlesnake (Sistrurus) | |||
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| massasaugas (Sistrurus); ground rattlesnakes (Sistrurus); Pygmy rattlesnakes (Sistrurus) | |||
| карликовый гремучник: 12 phrases in 3 subjects |
| Amphibians and reptiles | 6 |
| Biology | 5 |
| Herpetology incl. serpentology | 1 |