The "feather" in the phrase "lighter than a feather" refers to the down on swans, also known as velvet. Since velvet is very soft and light, "lighter than a feather" is used to describe something very light and lightweight. It should be noted that "feather" itself is not an animal's hair, but just a metaphor.
animal tags： swan
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Ants are small, social insects that belong to the family Formicidae. They are among the most diverse groups of animals on Earth, with over 12,000 known species and potentially many more yet to be discovered. Ants are found on every continent except Antarctica and play crucial roles in various ecosys...
Endothermic animals are animals that are able to maintain a constant temperature within their bodies and can survive in different environmental temperatures. Here are some common warm-blooded animals:1. Mammals: such as humans, cats, dogs, cows, pigs, rats, etc.2. Birds: such as hawks, pigeons, duck...
Paleontology refers to ancient creatures that have become extinct. Most of these creatures had many unique characteristics, sometimes quite different from modern creatures. Here are some famous paleontological creatures:1. Tyrannosaurus: A dinosaur that lived about 68 million years ago and is one of...
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