Asks LJ which British birds are polygamous. His query relates to the possession by the male of secondary sexual characters.

CD is also interested in the numerical proportion of the sexes in birds.

Asks about the use of the horns in male lamellicorn or coprophagous beetles.

On polygamous birds and the pairing of birds. Late singing of males. [see Descent 2: 107.]

Thanks LJ for his useful facts. Will "look to" the reference about the nightingale.

Sends his notes on Florent Prévost’s reference to the habits of the cuckoo.