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Use "hindwing" in a sentence
"The color can be variable below- from yellowish to brown, this one is worn and still shows a hint of the yellowish scales around the some of the veins on the hindwing."
"If you look closely, you will notice that this individual is missing a small portion of its hindwing, including one of the pair of hair-like tails it had."
"Of the well-known green species of papilio, with longish tails and blue or green spots on the hindwing, there are four species, of which one is European."