Whimbrel

Numenius phaeopus

The Eurasian whimbrel, historically known as the white-rumped whimbrel in North America, is a wader in the large family Scolopacidae. It is one of the most widespread of the curlews, breeding across much of subarctic Palearctic region and Europe as far south as Scotland. This species and the Hudsonian whimbrel were split in 2019, although some taxonomic authorities still consider them to be conspecific. Source

Where it is now

In the last 8 weeks this bird was recorded 94,206 times across 150 areas (each area is a 5 degree square).

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Movement and weather

Each season it is first heard regularly where daytime highs are around 13°C (typically 8 to 24°C, from 46 areas). That range is wide, so temperature alone does not explain when it turns up.

Over the weeks it was present in the past year, its centre in North America ranged from 27°N in September to 57°N in August, about 3,300 km apart.

Arrival dates

The week it was first heard regularly in each region, after at least six weeks away. Dates differ from south to north, so a region has a range.

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Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.