In the United Kingdom, a red-bordered triangular sign showing a deer warns drivers about wild animals.
The sign is a warning sign rather than a regulatory sign. It tells drivers that animals may cross or be present on the road, so they should reduce speed and be prepared to stop. Deer are the familiar symbol, but the warning applies more broadly to wild animals.
The sign is especially relevant on rural roads, near woodland, and in areas with known deer movement. It does not give drivers permission to ignore other speed limits or road rules. The pictogram identifies the hazard; the red triangle signals that caution is required.
A nearby concept is the United Kingdom's animal-crossing signage for domestic animals, such as cattle or sheep. Those signs use different silhouettes because livestock and wildlife create different road hazards.