An authentic, perfect and bright, originally hand-colored, illustration of 6 Colibri's, on parchment paper (copper engraving). It has a fine shining because of the authenticly applied egg-yolk as varnish. The Artist is Robert Bernard (1792). The illustration is plate number 129 from ''Encyclopédie méthodique: Histoire Naturelle, Ornithologie', by Panckoucke (Paris), after the famous Encyclopédie by Diderot and d'Alembert.