One more little thing I've just remembered, I thought it was very interesting that on the roof behind the bee-eaters there was a beehive, which allowed the bee-eaters to hunt for their own food. I'm assuming this was a deliberate choice by the zoo, rather than a coincidence?
Yes, it is something they do as an extra in the insect diet of the bee-eaters. The beehive is taken care of by a bee keeper who also provides drone brood as part of the bee-eaters diet.