Alfred Newton FRS HFRSE was an English zoologist and ornithologist. Newton was Professor of Comparative Anatomy at Cambridge University from 1866 to 1907. Among his numerous publications were a four-volume Dictionary of Birds (1893–6), entries on ornithology in the Encyclopædia Britannica while also an editor of the journal Ibis from 1865 to 1870. In 1900 he was awarded the Royal Medal of the Royal Society and the Gold Medal of the Linnaean Society. He founded the British Ornithologists Union.

Ibis, subtitled the International Journal of Avian Science, is the peer-reviewed scientific journal of the British Ornithologists' Union. It was established in 1859. Topics covered include ecology, conservation, behaviour, palaeontology, and taxonomy of birds. The editor-in-chief is Dominic J. McCafferty. The journal is published by Wiley-Blackwell in print and online. It is available free on the internet for institutions in the developing world through the OARE scheme.