"A black jacobin hovers in front of the morning sun and as the light penetrates its wings the feathers become ‘filled with rainbows’. Christian used the high clouds as a secondary filter to reveal this prism effect, otherwise invisible to the naked eye.
Hummingbirds have the fastest wingbeats in the bird world – up to 90 beats per second. As light passes through the narrow gaps in-between feathers, it is split – or diffracted – into the colours of the rainbow, creating a shimmer."