Observation reveals unusual plumage colouration in spot-billed pelicans at Pulicat Lake, suggesting a unique phenomenon.
Plumage colour variation is rarely observed in the Pelecaniformes and had not been previously recorded for the Spot-billed Pelican Pelecanus philippensis. Observed at Pulicat Lake, Andhra Pradesh, India, I describe strikingly coloured Spot-billed Pelicans having dark brown plumage, pink coloration on the bill, and black feet, but having normal eye colour
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Vaithianathan Kannan (2021) studied this question.
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