Also called bonxie. any of severallarge brown gull-like predatory birdsof the genus Catharacta, related to jaegers, especially C. skua (greatskua) of colder waters of bothnorthern and southern seas. (http://dictionary.reference.com/browse/skua)
"The apparatus responds to his attention: the glass gleams, the brass shines, and the light rotates on its bath of mercury as smoothly as a skua gliding on currents of air."
- M. L. Stedman, The Light Between Oceans (2012)