The great London Zoo animal count

Last updated at 06:03
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Joe joins the guys counting the animals at London Zoo

Every year, London Zoo count all the animals they keep.

This year is no different, and it's all in the name of keeping their records up to date.

It's not easy though - with about 18,000 animals under their roof, they have their work cut out.

Joe has been down to find out how... and why... they do it.