| 21. | Numerous native species have been reported as successfully preying on toads.
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| 22. | There are some hazards to planting non-native species in your yard.
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| 23. | Those that do not are commonly occurring native species or migrants.
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| 24. | Foreign species already outnumber surviving native species in Brooklyn and Manhattan.
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| 25. | We have a strong moral commitment to preserve the native species,
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| 26. | It crowds out native species and threatens to destroy delicate Florida Everglades ecosystems.
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| 27. | While doing that, it ingests the plankton that native species need.
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| 28. | But to some environmentalists it is also a practice that threatens native species.
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| 29. | Walla Walla the Douglas squirrel, a native species of much of Washington state.
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| 30. | Invasive species pose another problem, competing with native species for food and habitat.
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