earch on hotspots has been done:
"New research, however, has revealed that the world's largest land animals have a secret trick to control their own body temperatures. Using thermal cameras, biologists have discovered that the creatures' bodies are covered in "hot spots" that can help them lose heat"
Hotspots like this can be seen on the back of a walrus, seals, and probably many more animals. Anyone knows any other type of animals with good looking hotspots?