Caption:
Common nightingale, Luscinia megarhynchos, and goldcrest, Regulus regulus, on ivy leaves, Hedera helix. Cinereous tit, Parus cinereus, and great tit, Parus major, on a holly bush, Ilex aquifolium. Handcoloured engraving on steel by Fournier after a drawing by Edouard Travies from Richard's "New Edition of the Complete Works of Buffon," Pourrat Freres, Paris, 1837.