| 41. | The scientists divided the state into eight ecoregions and identified the primary migration routes in each.
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| 42. | The researchers conclude that the tools were used by hunters who were following game migration routes.
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| 43. | Bird migration routes have been studied by a variety of techniques including the oldest, marking.
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| 44. | Porkkala is also on one of the main bird migration routes in the Baltic Sea region.
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| 45. | The island overlooks one of the great whale migration routes, most notably for humpback whales.
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| 46. | In some areas, migration routes have changed due to changes in habitat and food sources.
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| 47. | Poda is located along Europe's second largest bird migration route, the Via Pontica.
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| 48. | The ancestors of the Delaware Nation, following a different migration route, settled in Anadarko.
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| 49. | It is a major migration route for Pacific chinook salmon that spawn in the Selway River.
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| 50. | Geographical features affect the migration route.
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