Trending: yellow trout lily (Erythronium americanum) — 1700 observations this week
iNaturalist Community
Phenology
iNaturalistThose cheerful yellow nodding flowers carpeting your local woodland floor in April are yellow trout lilies — and right now thousands of people are documenting exactly when and where they bloom, building a living map that helps track how spring is shifting earlier each decade.
Yellow trout lily is a small wild plant with speckled leaves and bright yellow flowers that pops up in forests every spring, often in large patches. This week, 1,700 people across North America spotted and photographed it, logging their sightings on a nature app. All those records together help scientists understand how spring is changing and where this beloved wildflower still thrives.
Key Findings
Yellow trout lily received 1,700 research-grade observations in a single week, making it one of the most-observed plant species on iNaturalist during this period.
The surge in sightings aligns with peak spring bloom timing in eastern North America, reflecting the species' narrow, early-season flowering window.
Community-submitted observations contribute directly to phenology research, with each geo-tagged record helping track shifts in bloom timing linked to climate change.
chevron_right Technical Summary
Yellow trout lily, a native spring wildflower, is blooming across eastern North America right now, generating 1,700 citizen science observations in a single week — a sign that spring phenology is in full swing and community naturalists are paying close attention.
Abstract Preview
yellow trout lily is among the most observed plant species this week with 1700 research-grade observations.
open_in_new Read full abstract on iNaturalistAbstract copyright held by the original publisher.
Species Mentioned
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Erythronium americanum, the trout lily, yellow trout lily, fawn lily, yellow adder's-tongue, or yellow dogtooth violet, is a species of perennial, colony forming, spring ephemeral flower native to North America and dwelling in woodland habitats. Within its range it is a very common and widespread...