Animals of this class are so recondite in their habits... so little known to naturalists beyond the more common species.
They turned the house upside down looking for the car keys.
It's why McDonald's finally downsized its portions, why you can now bake a gluten-free version of the same Betty Crocker toothachingly sweet cake mix you enjoyed as a child.
From the point of view of biology, a bird has both a scientific name and a common name.
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