The Dainty Sulphur is the smallest sulphur butterfly in North America, barely over an inch in wingspan, with pale yellow wings and distinctive dark markings at the wing tips and along the inner hindwing margin. Despite its tiny size it is a strong migrant, expanding northward in summer. Adults fly close to the ground and are easily overlooked among weeds.
Best time to see a Dainty Sulphur
The best time to see a Dainty Sulphur is March–September, when about 63% of U.S. sightings happen, based on 25,003 research-grade iNaturalist observations.
Not certain it is a Dainty Sulphur? What bug is this? walks through what to check first and the lookalikes that catch people out.
Recent Dainty Sulphur sightings near you
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