| 31. | Migratory birds and other animals are also affected by the pollution.
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| 32. | A research center for migratory birds has been created in 1994.
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| 33. | They eat trout and the migratory birds that also follow the same path.
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| 34. | Many migratory birds halt here on their way north or south.
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| 35. | A whooping crane census in 1941 counted only 15 migratory birds.
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| 36. | Loss of Canadian boreal forest is a threat to migratory birds.
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| 37. | Large numbers of migratory birds use Matsalu as a staging area.
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| 38. | The total number of migratory birds is reported as 100 species.
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| 39. | But all migratory birds are catching it, in winter and summer.
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| 40. | Migratory bird species from all over the world visit these areas.
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