The Association of British Zoologists was formed at the Meeting of British Zoologists on 5 Jan 1929 "to ensure a permanent organisation, with a Council which can represent British Zoologists between their annual Meetings". The first Council meeting was on 11 Jan 1930. Final meeting held 13 Jan 1973

The Zoological Society of Glasgow was founded on 14th December 1936 by Edward Hindle, who was a professor of zoology at the University of Glasgow. Its name was later changed to the Zoological Society of Glasgow and West of Scotland.

The Wildfowl & Wetlands Trust (WWT) is an international wildfowl wetland conservation charity in the United Kingdom.

The trust was founded in 1946 by the ornithologist and artist Sir Peter Scott as the Severn Wildlife Trust.

The first site at Slimbridge was a centre for research and conservation. In a move unusual at the time, he opened the site to the public so that everyone could enjoy access to nature.

This organisation later developed into the Wildfowl & Wetlands Trust, the only United Kingdom charity dedicated solely to promoting the protection of wetland birds and their habitats

The Association of Bird Watchers and Wardens was created and tasked with watching nests and guarding birds and their eggs from illegal take

The Institute of Zoology is the scientific research division of ZSL. It is a government-funded research institute, which specialises in scientific issues relevant to the conservation of species and their habitats. The Institute of Zoology focuses its research on five areas: evolutionary biology, genetics, ecology, reproductive biology and wildlife epidemiology. The Institute was graded 4 in the 1997-2001 UK Research Assessment Exercise, and publishes reports annually. From the late 1980s the Institute of Zoology had been affiliated to the University of London. However, in 2000 this was replaced with a partnership with the University of Cambridge

In 1976 the Nuffield Institute of Comparative Medicine, the Animal Hospital, and the Pathology Laboratory were integrated to form the Institute of Zoology.

Founded in 1826, the Zoological Society of London (ZSL) is an international scientific, conservation and educational charity whose mission is to promote and achieve the worldwide conservation of animals and their habitats. It runs the Institute of Zoology, conservation projects in more than 50 countries, and two Zoos, ZSL London Zoo and ZSL Whipsnade Zoo

The British Trust for Ornithology is an organisation founded in 1932 for the study of birds in the British Isles. Max Nicholson was the first treasurer, Bernard Tucker was the secretary and Harry Witherby was an early benefactor and vice-chairman