Aviarist

1979, Al Shenk, Calculus and Analytic Geometry, 2nd Edition, Scott Foresman, page 385, An aviarist is watching one of his birds that has escaped and is flying directly south from the aviary at a height of 100 feet above the aviarist’s eye level.

But if the Aviarist be ambitious to keep the lovely, but destructive, members of the Parrot family, he must be content with grass alone, because Parrakeets (except the weak-billed Turquoisines and Elegants) would destroy the shrubs and trees in a day.

Since then the price of these handsome Doves has fallen considerably, but it is still sufficiently high to make a good breeding pair of them a by no means unprofitable investment for the aviarist.