Toco toucan, Oz, opts for a traffic light sequence when keepers hand out the iron tablets.
The bird slows down for the red pellets before getting ready for amber and then going for green.
The tri-coloured diet helps prevent iron-storage disease excessive accumulation of iron in the liver and other major organs.
Curator Matt Lewis said:?Oz always goes for this sequence although it doesnt seem to apply to other foodstuffs as he certainly doesnt eat his tomatoes first!”
CAPTION: Red, amber, green to go for DZGs toco toucan, Oz, when he takes his iron tablets.