Copper Sunbird

I saw this bird at Whipsnade zoo. It was in the same area as various species of butterfly. It was eating a slice of orange shared by the butterflies. A crowd of people had just left and I was enjoying the peace and quiet when this bird flew down and took a couple of bites before flying off again just before the next crowd came in. It was singing in the bushes but no one else had the pleasure of seeing it.