Note 39 — Chapter XVIII · ON THE ADVANTAGES AND DISADVANTAGES OF CHANGED CONDITIONS OF LIFE: STERILITY FROM VARIOUS CAUSES.
Reading edition
A case is recorded in ‘The Zoologist,’ vol. i.-ii., 1843-45, p. 453. For the siskin breeding, vol. iii.-iv., 1845-46, p. 1075. Bechstein ‘Stubenvögel,’ s. 139, speaks of bullfinches making nests, but rarely producing young.