The Hungarian meadow viper breeding programme has reached an important milestone: on 1 August 2026, the programme’s 6.000th Hungarian meadow viper—a female—was born at the Hungarian Meadow Viper Conservation Centre. During this year’s breeding season, 26 females gave birth to a total of 252 live young.
Gestation lasted approximately 98 days on average this year, with the shortest recorded period being just 95 days. The persistently high temperatures accelerated embryonic development, allowing the young vipers to be born after a shorter gestation. However, this did not affect their body size or mass: as in previous years, the 252 measured newborns had an average body mass of 2.6 grams and an average total length of 14.4 centimetres.
At the same time, the heat and drought pose a serious threat to newborn vipers. The young snakes need water immediately after birth: they must drink, and adequate hydration is also essential for their first shed to proceed without complications. Under natural conditions, morning dew can provide an important source of water, but prolonged dry weather often prevents it from forming. This makes the first, critical stage of their lives particularly difficult and may also claim victims in the wild.
At the Conservation Centre, we therefore watered the outdoor enclosures regularly and made sure that fresh drinking water was always available to the newborns. After their first shed, the young vipers bask briefly to warm themselves to the body temperature required for feeding. Only then do they begin eating their first food: small-sized domestic crickets provided by Budapest Zoo & Botanical Garden, one of the programme’s partners.
Every newborn is assigned a unique identifier, measured and photographed, allowing its development to be monitored and recorded accurately throughout its life. Individuals raised at the Conservation Centre may later be selected for reintroduction, meaning that this year’s generation can also contribute to strengthening wild populations.
Join us for Hungarian Meadow Viper Day!
If you would like to see what a Hungarian meadow viper less than a month old looks like, you can meet the youngest members of this year’s cohort at the Conservation Centre on 5 September. Hungarian Meadow Viper Day will also be marked with special programmes in Szeged and Budapest:
- A guided walk will be held at and around the Hungarian Meadow Viper Conservation Centre. At the end of the three-kilometre walk, participants will be able to see this year’s young vipers in the Centre’s outdoor enclosures. Participation is free of charge, but advance registration is required. Programme details and registration
- At Szeged Zoo, visitors will be able to observe the public autumn weighing and measuring of the Hungarian meadow vipers living there.
- At Budapest Zoo & Botanical Garden, visitors will be welcomed at an information stand, while Hungarian meadow vipers can also be seen in the Venom House.
Everyone is warmly welcome!
Photos: Anna Egerer, Balint Halpern
