Chestnut-breasted Wren

Cyphorhinus thoracicus

The southern chestnut-breasted wren is a species of passerine bird in the wren family Troglodytidae that is found in southern Peru and the extreme northwest of Bolivia. It was formerly considered to be conspecific with the northern chestnut-breasted wren with the English name "chestnut-breasted wren". Source

Where it is now

In the last 8 weeks this bird was recorded 1,480 times across 2 areas (each area is a 5 degree square).

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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.