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No matter how excellent a human athlete can be in his attempts in an extreme endurance sport, it cannot be likened in any way to bird migration. |
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Even though migrating birds can be likened to human athletes in extreme endurance sports, the best athletes prove to be far superior to birds. |
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Both bird migration and human athletic activities are similar in that the best examples in both cases are very impressive. |
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An extreme endurance sport endeavour is comparable to bird migration; however, its most extraordinary instances go beyond it in comparison. |
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Bird migration is akin to an extreme endurance sport; nevertheless, no matter how remarkable they are, human sports activities fall behind when compared to it. |