The Western Pygmy Blue is the smallest butterfly in North America, with a wingspan barely exceeding half an inch. Despite its tiny size it can be abundant in coastal salt marshes and desert washes. Its wings are dull brownish at the base with pale blue patches and a row of metallic spots near the trailing edge. Males are persistent flower visitors.
Best time to see a Western Pygmy Blue
The best time to see a Western Pygmy Blue is August–November, when about 60% of U.S. sightings happen, based on 16,561 research-grade iNaturalist observations.
Not certain it is a Western Pygmy Blue? What bug is this? walks through what to check first and the lookalikes that catch people out.
Recent Western Pygmy Blue sightings near you
Live, research-grade observations from iNaturalist. Allow location to center the map on you.
Spotted a Western Pygmy Blue?
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