The Cassius Blue is a small butterfly of southern Florida and the Gulf Coast with pale blue-and-white striped wings below and powder blue above in males. It is abundant in gardens where lead plant and plumbago grow. Two dark eyespots near its hindwing tail mimic the head, deterring predators with a false target.
Best time to see a Cassius Blue
The best time to see a Cassius Blue is April–October, when about 62% of U.S. sightings happen, based on 4,942 research-grade iNaturalist observations.
Not certain it is a Cassius Blue? What bug is this? walks through what to check first and the lookalikes that catch people out.
Recent Cassius Blue sightings near you
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