ScienceDaily Posted May 16, 2018 Share Posted May 16, 2018 For decades, researchers have thought that access to food determined the brood size of birds. Now, biologists have discovered a completely new explanation: the body temperature of small birds can increase by more than 4°C to exceed 45°C when they are feeding their young. Larger broods would require more work, resulting in even higher body temperatures -- something the birds would probably not survive. View the full article Link to comment Share on other sites More sharing options...
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