The chevrons and dots at the top edges of the wing are the best field identification clues for the spring azure.
Michigan also has Northern Azures, but they have a dark spot in the wings. Your picture does not display that. Maybe the blotch is an artifact of age.
Sometimes the summer azure and spring azure are considered the same species. They look similar.
Michigan has all three species.
https://greennature.com/michigan-butterflies/
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