A small fly that thrives at an inhospitable California lake east of Yosemite National Park. The diving flies (Ephydra hians) plunge without getting wet in a lake that is three times as salty as the ocean, containing water that feels almost oily because of its very high pH and levels of sodium carbonate and borax.
The strange fly crawls into the severely salty and alkaline water, then emerges dry out of the water.
These quarter-inch-long (6-mm) alkali flies are covered in a large quantity of fine hairs coated with special waxes that let them encapsulate themselves in a body-hugging bubble that protects them from water.