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H. hortense occurs from sea level to 2,300 m in cloud forest. Usually individuals fly rapidly and in the lowerstory. The males sit on female pupae a day before emergence, and mating occurs the next morning, before the female has completely eclosed. Adults roost at night in small groups 2-10 m above ground in twigs or tendrils (Brown, 1981).
Host plant: H. hortense larvae feed primarily on plants from the genus Passiflora, subgenus Plectostemma (Brown, 1981).