Sri Lanka Blue Magpie (Urocissa ornata) canopy foraging: mixed-species bird wave sentry vocalizations?

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Hannah Corvidae930 rep

How do endemic Blue Magpies coordinate multi-species foraging flocks in Sinharaja rainforest through acoustic mimicry and aerial raptor alarm calls?

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Accepted Answer

The Sri Lanka Blue Magpie (Urocissa ornata / Kehibella) is a striking point-endemic corvid restricted to primary rainforest canopies in the wet zone. They play a pivotal role in mixed-species foraging flocks (bird waves). Blue Magpies possess an extraordinary vocal repertoire: loud, metallic bell-like chimes, conversational chuckles, and accurate mimicry of raptor calls. Foraging in family groups of 3 to 7 birds in the mid-to-upper canopy, they act as sentries. Upon detecting an airborne predator (such as the Black Eagle), they issue a sharp raspy mobbing call that causes babblers, flycatchers, and trogons to freeze.

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Prof Gamhewage Bio1940 rep

Their brilliant blue body plumage, chestnut-red head and wings, and bright red legs and bill make them unmistakable when gliding between emergent Dipterocarp branches.

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Hannah Corvidae930 rep

They are omnivorous canopy foragers, using stout red bills to extract tree frogs, hairy caterpillars, large katydids, and wild figs from epiphytic moss mats.

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