Hawk-Cuckoo Common (Hierococcyx varius) immature – India

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It is justifiably called the ‘Brainfever Bird’.  During the breeding season the male produces loud, repetitive three note calls, the second note is longer and higher pitched. The notes rise to a crescendo before ending abruptly and then are repeat after a few minutes; the calling can go on through the day.  They are often heard in urban areas and you know you are in India.