| water | 0.59 |
| the region | 0.25 |
| higher altitudes | 0.25 |
| lie their eggs | 0.67 |
| lay their eggs | 0.65 |
| breathe through their s… | 0.65 |
| live on land | 0.64 |
| begin their lives | 0.59 |
| live part of their life | 0.58 |
| use their skin | 0.56 |
| undergo metamorphosis | 0.56 |
| cross the road | 0.51 |
| return to the water | 0.45 |
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| four legs | 0.59 |
| permeable skin | 0.50 |
| smooth, moist skin | 0.48 |
| tail | 0.45 |
| gill | 0.45 |
| complex life cycle | 0.41 |
| small geographic ranges | 0.29 |
| leg | 0.29 |
| three-chambered heart | 0.29 |
| two circulatory routes | 0.25 |
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| water | 0.58 |
| vertebrate | 0.69 |
| vehicle | 0.29 |
| dominant land vertebrat… | 0.25 |
| the most threatened ver… | 0.16 |
| threatened | 0.53 |
| threatened with extinct… | 0.48 |
| sampled | 0.37 |
| protected | 0.35 |
| infected with bd | 0.31 |
| killed | 0.28 |
| threatened by habitat l… | 0.28 |
| housed | 0.25 |
| transported | 0.25 |
| threatened by chytridio… | 0.25 |
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