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