Least Concern· population increasing· assessed 2018

Harlequin Duck

Histrionicus histrionicus

Sighting evidence at Silfra Fissure, Silfra Fissure

Evidence at this site

57 records within 25 km

Confidence: high

Last confirmed Jun 2026

Seasonality

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How is this calculated?

Sighting evidence is compiled from iNaturalist observation records within a set proximity radius, filtered for quality-grade observations. “Last confirmed” is the date of the most recent research-grade record. Record count covers a rolling 24-month window. Confidence reflects record count, recency, and consistency of seasonal signal.