From Arthur Nicols   15 March 1880

11. Church Row | Hampstead— | N.W.

March 15th 1880

Dr Chas: Darwin,

Dear Sir,

Although that which is a new observation to me is likely to be quite familiar to you, I venture to send you some of the tail coverts of a male pheasant, which simulate, especially in the small pseudo “ocelli”, the corresponding feathers of the peacock. The bird was killed just at the end of the season, and was in magnificent nuptial plumage, having the white ring on the neck and being, as I should judge from his spurs, three years old.

Comparing him with examples of P. Colchicus, P. versicolor, and P. torquatus, he seems to share the blood of all, but the characters of the latter prevail. On the other hand he is (unlike the pure P. torquatus) a very large individual.1 The point that struck me in this bird was the (to me unusual) distinctness of the pseudo “ocelli” of the tail coverts. Whether this has any significance I must leave you to decide.

Perhaps these markings should not be termed ocelli at all, but the semi-lunar green mark incloses an irregular spot differently coloured, and the barbs are separated as in the peacock’s feathers.

Looking down the back of this bird I was much struck by the general resemblance of the tail coverts to those of the peacock, when not spread out.

yours faithfully | Arthur Nicols.

The feathers have not been found in the Darwin Archive–CUL. Phasianus colchicus is the common pheasant; P. versicolor, the green pheasant; P. colchicus torquatus, the Chinese ring-necked pheasant. CD had discussed the variation of ocelli in pheasants and peacocks in Descent 2: 132–51.

Please cite as “DCP-LETT-12536,” in Ɛpsilon: The Charles Darwin Collection accessed on 5 June 2025, https://epsilon.ac.uk/view/dcp-data/letters/DCP-LETT-12536