All 2,500 animals at Whipsnade Zoo in Bedfordshire are being weighed and measured as part of an annual survey.
One of the keepers, Darren Fellows, told ITV News Anglia that they have special scales to weigh the elephants and because the animals response to commands, the task of weighing them is not too difficult.
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It will be a fine start to the Bank Holiday weekend but there's a risk of heavy rain in some places by Sunday.
Yamaha rider Jorge Lorenzo set the pace in practice for Sunday's British Grand Prix.
It will be a dry and bright start to the Bank Holiday Weekend before heavy, showery rain arrives on Sunday.