Science: Swamp Eagles

Among the mosquito capitals of the world, the salt marshes of New Jersey, home of the "swamp eagle," still holds its own. Last week many a newborn Jersey swamp eagle had its first taste of human blood. The donor: Dr. Willem Rudolfs, New Jersey agricultural experiment station researcher.

Every year Dr. Rudolfs makes a trade with the swamp eagles: He gives them blood, they give him information. Not many availed themselves of the trade last week as the Jersey mosquitoes have not yet attained their summer cloud proportions. When plentiful later on in...

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