How did animals get escape from sunburn?

Sunburn is the reddening of skin due to over exposure of Ultra violet radiation. Due to ultraviolet radiation of sun, animals also get sunburn. However to protect themselves from this harmful effect, different animals have different mechanisms to protect themselves from sunburn. 

• Reptiles have scales
• Birds have feathers
• Animals like sheep, dogs and cats have furs
• Sperm whales have special protein
• Fin whales have more melanin

Some animals secrete certain substances to protect themselves from the harmful radiation. 

• Hippopotamus secrete a fluid made of proteins red and orange pigments
• Fish and amphibians secrete a chemical called gadusol

In addition to this animals like elephants, rhinocerous and pigs take mud baths.