Radjah Shelduck

Radjah radjah

The radjah shelduck is a species of shelduck found mostly in New Guinea and Australia, and also on some of the Moluccas. It is known alternatively as the raja shelduck, black-backed shelduck, or in Australia as the Burdekin duck. Source

Where it is now

In the last 8 weeks this bird was recorded 104 times across 4 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 Oceania ranged from 22°S in November to 12°S in November, about 1,000 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.