| sonic hedgehog | 0.33 | Other viruses, however, could easily be developed to insert the Sonic hedgehog gene, Crystal said. | ||
| young hedgehog | 0.33 | The young hedgehog sniffed at the food. | ||
| little hedgehog | 0.26 | I saw a haughty little hedgehog and I was hooked. | ||
| pygmy hedgehog | 0.26 | The African pygmy hedgehog is the new star of the animal world. |