This nightjar has broken its usual camouflage to bravely protect its nest from an approaching adder; our only venomous snake.
It's making itself look as big as possible, and that massive mouth might just be enough to give the snake pause for thought.
If you're very lucky, and near some heathland, you might hear one of these 'churring' through the night while on your Big Wild Sleepout (coming up in June).
Well done to David Tipling for capturing this rare and compelling moment for our image archive rspb-images.com.