Most commonly found in pink, white, or Monax — a pale, iridescent hue — this pattern is increasingly rare and valuable. Produced by the Federal Glass Company during the 1930s, the Parrot ...

Baillie, S.R., Gregory, R.D. & Siriwardena, G.M. 1997. Farmland bird declines: patterns, processes and prospects. British Crop Protection Council, Farnham ...