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Large Milkweed Bug Video Stock Footage
Diapause occurs on short days and on cold days in temperate regions and occasionally occurs during dry season in tropical regions. Most populations of the milkweed bug overwinter usually after migration to their overwintering sites due to environmental triggers such as temperature and photoperiod. However, photoperiod only predicts overwintering in areas where day length effects the maturation of milkweeds. Therefore, no overwintering occurs in tropical regions as it does not supply an adaptive advantage.
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