Whose discovery showed that birds make their own compass-like decisions during migration rather than simply following instinct blindly?
Quick Answer
This is mainly a result of modern ethology and migration science, not a single discovery by one person. Studies by researchers such as Gustav Kramer and later Peter Berthold helped show birds use learned and inherited cues.
The Full Story
Gustav Kramer was an important 20th-century scientist whose work helped reveal how birds orient themselves during migration. He showed that birds use environmental cues such as the sun as a compass. Later researchers, including Peter Berthold, helped demonstrate that migration involves both inherited programs and learning. Together, these findings changed the idea that migration is purely automatic.
Key Facts
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"How birds know where to go without GPS"
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