Zodiac celestial coordinate system, or more specifically an ecliptic coordinate system, which takes the ecliptic as the origin of latitude and the Sun's position at vernal equinox as the origin of longitude. The English word ' derives from ', the Latinized form of the Ancient Greek "zōidiakòs kýklos" (), meaning "cycle or circle of little animals". "Zōidion" () is the diminutive of "zōion" (, "animal"). The name reflects the prominence of animals (and mythological hybrids) among the twelve signs. The zodiac was in use by the Roman era, based on concepts inherited by Hellenistic astronomy from Babylonian astronomy of the Chaldean
Letter-winged kite under its current binomial name "Elanus scriptus". The specific epithet is from the Latin word "scriptum" meaning "written" or "marked". Charles Sturt wrote of seeing them on his travels in his 1849 book "Narrative of an expedition into Central Australia". The letter-winged kite is monotypic; no subspecies are recognized, nor is there any recorded geographic variation. "Letter-winged kite" has been designated the official name by the International Ornithologists' Union (IOC). In Central Australia, southwest of Alice Springs, the Pitjantjatjara term for the letter-winged kite is "nyanyitjira". It has been incorrectly called white-breasted sparrowhawk. Molecular evidence shows that the letter-winged kite