Zoology glossary ~ U

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Upland
"Pertaining to areas away from coastlines and the floodplains of rivers, streams, and other bodies of water."

Upwelling
"Oceanic areas where deep waters rich in nutrients rise to the surface because of the shape of the ocean bottom, the presence of continental land masses, or contact between water currents."

Urohydrosis
"The habit of releasing feces onto the scaly portions of the leg as a cooling mechanism, using evaporative cooling of the fluids. Found in storks and New World vultures."

Uropygial Gland
"The source of the oil that a preening bird rubs on its feathers to maintain them in good condition; located on the lower back near the rump."