Swainson's Thrush

Catharus ustulatus

Swainson's thrush, also called olive-backed thrush, russet-backed thrush, and salmonberry bird is a medium-sized thrush. It is a member of genus Catharus and is typical of it in terms of its subdued coloration and beautiful, ascending flute-like voice. Swainson's thrush was named after William Swainson, an English ornithologist. Source

Where it is now

In the last 8 weeks this bird was recorded 56,842 times across 61 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 20°C (typically 15 to 25°C, from 46 areas).

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.