How many Eyes does a Housefly have?
The ordinary housefly has five eyes--two large searchers and three tiny ones. You can easily see two big eyes that cover most of fly's head...
The ordinary housefly has five eyes--two large "searchers" and three tiny ones. You can easily see the two big eyes that cover most of the fly's head. These are its compound eyes. Each one is made up of 4,000 small lenses. Everything a fly looks at appears as thousands of tiny images. Three more eyes are arranged in a neat triangle atop the fly's head. These tiny, simple eyes can only detect changes in the patterns of light and shadow around it. With its many eyes watching, a wide-awake fly is usually able to dodge your swatter safely.
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