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Both chi-chaks and tokays have discovered that the lights used at night by human beings in their houses attract great numbers of flying insects, so they establish their territories nearby, quite unconcerned by the presence of people a few yards away. Often a single gecko will claim the entire area illuminated on the ceiling by a bulb and aggressively chase away any other that dares to venture on to it. The tokay repeats its two-syllable call about half a dozen times and then ends each sequence with a low gargle. The number of repetitions, however, varies and the local people, who are often dedicated gamblers, will sit late into the night placing extravagant bets on how many times a male will next repeat himself.
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