Crested Oropendola

Psarocolius decumanus

The crested oropendola, also known as the cornbird, is a species of bird in the family Icteridae, the oropendolas, New World orioles, and New World blackbirds. It is found in Costa Rica, Panama, Trinidad and Tobago, and every mainland South American country except Chile and Uruguay. It is "[u]ndoubtedly overall the commonest and most widespread oropendola". Source

Where it is now

In the last 8 weeks this bird was recorded 1,676 times across 12 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 17°S in September to 4°N in October, 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.