Pat Shingleton: "Ear Cooling..."
We recently noted how turkey vultures avoid overheating. The black-tailed jackrabbit also has a built-in cooling apparatus. Due to its oversize ears, these trademark appendages increase the hare's audio range to avoid predators. Due to the abundance of blood vessels, its 7-inch ears are also a cooling mechanism that dissipate heat and regulate body temperature. The black-tailed jackrabbit also has a voracious appetite and can easily adapt to the heat and climate of Death Valley. Like many desert animals, it gets its water from plants. To adjust to seasonal changes it switches its grazing patterns by waiting until summer's heat to load-up on water filled cacti and grasses; often eating several times its body weight per day to stay hydrated.