Un papillon (sing.) des papillons (plur.)
There were migratory butterflies.
Butterfly or butterflies can be considered a morpheme. The words are "butter" and "fly". A morpheme is a smaller meaningful word in a larger word.
butterflies
a buch of butterflies flew across my backyard.
la maison des papillons
'la maison des papillons'
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There are currently between 15,000 and 20,000different species of butterflies across the world.
The word "cocoon" originates from the French word "cocon," which means "eggshell" or "nutshell." It is used to describe the protective casing that certain insects, such as butterflies and moths, spin around themselves during the pupal stage of their life cycle.
In the King James version the word - butter - appears 11 times, none of them in the word butterfly or butterflies.
Lepidoptery or lepidopterology is the branch of entomology that deals with the study of lepidopterans (butterflies and moths).
"un papillon"