Did you know that not all Fruit Flies feed on fruit? (50s)

There are approximately 1,500 species of Fruit Flies and half of them feed on vegetables.

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DeWayfarer · 61-69, M

It's the sugars in the veggies that attract them.

Bet you if it came down to starvation they would eat regular fruit.

They just specialized. Less competition on veggies.