Yellow-olive Flycatcher

Tolmomyias sulphurescens

The yellow-olive flatbill or yellow-olive flycatcher is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Mexico, in every Central American country, on Trinidad, and in every mainland South American country except Chile. Source

Where it is now

In the last 8 weeks this bird was recorded 11,648 times across 20 areas (each area is a 5 degree square).

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Movement and weather

Over the weeks it was present in the past year, its centre in South America ranged from 22°S in February to 1°S in September, about 2,300 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.