The zoo’s male, Kuzma, who was born at Banham in 2008, was recently ranked as one of the most important males within the breeding programme.
His genes are poorly represented within the captive population so breeding him was considered a high priority. His mate, Sveta, arrived from Lisbon Zoo, Portugal in 2011 and this is their first successful litter together.
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It will be dry and sunny for most over the next few days - but that won't help the temperatures.
A rescued bull terrier was found to have more than 50 shot gun pellets and the crown from a tooth embedded in his face.
A dry night with clear skies will leave to frost and fog patches overnight.