| 21. | Migration routes from Canada have been severed by logging on both sides of the border.
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| 22. | Other habitat on migration routes has been destroyed by new construction or by giant farms.
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| 23. | GRAPHICS : Migration route of Monarch butterfly.
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| 24. | That information can later be used to protect valuable habitat niches on their migration routes.
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| 25. | But illegal migration routes and methods are as diverse as the people who use them.
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| 26. | Seasonal migration routes evidence their ancient journeys.
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| 27. | These birds follow a western migration route and spend the winter in Netherlands and Germany.
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| 28. | Migration routes extend the range of this species into many parts of Africa and India.
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| 29. | The other primary migration routes for North American birds include the Central and Pacific Flyways.
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| 30. | The other primary migration routes for North American birds includes the Mississippi and Pacific Flyways.
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