| species list | 5.27 | It is also on the endangered species list. | ||
| species barrier | 1.32 | The species barrier is gone. | ||
| species law | 1.12 | Both kinds of whale are protected under U.S. endangered species law. | ||
| species protection | 0.99 | Critics argue this provisions could bog down species protection in court. | ||
| species act | 0.59 | By midsummer, the House is also expected to pass a bill scrapping much of the species act. | ||
| species listing | 0.53 | The relaxation of requirements for endangered or threatened species listings. | ||
| species regulation | 0.53 | But the Central Valley is in a league of its own when it comes to controversy over endangered species regulations. | ||
| species extinction | 0.39 | He found that the rate of species extinction was about the same in all of the areas. | ||
| species habitat | 0.39 | Wildfires east of Phoenix are threatening summer homes, recreation areas and endangered species habitats. | ||
| species loss | 0.33 | It lays out the story of species loss in a particularly clear way, illustrated with incredible photographs. | ||
| species bill | 0.26 | A new endangered species bill could be introduced before Parliament breaks for summer recess, said Curtis. | ||
| species difference | 0.26 | This inconsistency may reflect species differences. | ||
| species survival | 0.26 | It was, they understood on some irrational, primal level, a matter of species survival. | ||
| species tulip | 0.26 | The snowdrops are blooming and the species tulips are popping up. |