In flight the hand was slender and when seen from the underwing the black on primaries created a classic cachinnans boomerang. |
The white apical spots are all relative small and there is a unique step in distance between tip of p6 and p9 making this individual distinctive. |
The upperparts are slightly darker than nearby argentatus which was obvious in both overcast and sunny weather. |
In the stretched wing the grey tongues on the outer primaries are obvious. |
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