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BiologyThe meadow viper feeds upon a variety of animal species, most commonly orthopterans (such as grasshoppers and crickets), followed by rodents, lizards, birds, spiders and beetles. However, significant seasonal variations in the diet exist, with invertebrates predominating only between July and September, and vertebrates playing a more important role at other times of the year (9). One poisonous bite is usually enough to kill the prey (2). Mating occurs from April to May and females give birth to four to eight (sometimes up to 12 or 15) live young from August to September (2). Clutch size appears to be positively correlated with female body size (10).