The Pale Arctic Sulphur is a greenish-white sulphur of high arctic and alpine tundra, with reduced dark markings adapted to cool, low-light environments. It is one of the most northerly butterflies in North America, found in the Canadian Arctic Archipelago. Its dull coloring relative to other sulphurs helps it absorb solar radiation efficiently in cold environments.
Best time to see a Pale Arctic Sulphur
The best time to see a Pale Arctic Sulphur is July, when about 62% of U.S. sightings happen, based on 50 research-grade iNaturalist observations.
Not certain it is a Pale Arctic Sulphur? What bug is this? walks through what to check first and the lookalikes that catch people out.
Recent Pale Arctic Sulphur sightings near you
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