Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Promoted
Why do chicken have to tilt their head upward when drinking any liquid?
2 Answers
Relevance
- Carl DLv 41 decade agoFavorite Answer
Birds and fowl lack smooth muscles in their throats to pull food and water down to their stomach. Therefore they have to lift up their heads and let it fall. This is why you can't bring a canary in outer space because it would starve/dehydrate.
- ursaitaliano70Lv 71 decade ago
They lack esophogeal peristalsis (waves of muscular contraction) like humans have.
Still have questions? Get your answers by asking now.