| 21. | These birds migrate in the winter to the southwestern United States and Mexico.
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| 22. | It ranges from southwestern United States to Mexico and Costa Rica.
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| 23. | The species is native to the southwestern United States and Mexico.
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| 24. | It is native to the southwestern United States and northwestern Mexico.
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| 25. | Like the southwestern United States, the Northwest definition has moved westward over time.
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| 26. | Its features are similar to the badlands found in the southwestern United States.
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| 27. | Sprague's pipits winter in the southwestern United States and northern Mexico.
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| 28. | Early sightings primarily occurred in the southwestern United States, particularly in New Mexico.
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| 29. | It is dedicated to the railroads of Arizona and the Southwestern United States.
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| 30. | It is found in the Southwestern United States, Mexico, and Guatemala.
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