The Gibraltar Ornithological & Natural History Society (GONHS), founded in 1976, is a non-governmental, membership-based organisation committed to research into, and conservation of, nature in Gibraltar and the region of the Strait of Gibraltar. The Gibraltar Ornithological & Natural History Society is active in a wide range of activities.

The Straits of Gibraltar Bird Observatory consists of members who primarily devote themselves to bird watching and bird ringing as well as other ornithological studies, both in Gibraltar and in Spain. During easterly winds, the bird-ringers of the Famous Grouse Ringing Group catch, ring and release birds, increasing knowledge of migratory birds.

Ongoing marine projects include the building of artificial reefs and scientific monitoring of pelagic marine mammals in the Straits, as well as marine life closer to shore. Members have helped with surveys, setting-up boxes for bats and reintroduction projects.

The Raptor Rehabilitation Unit is a specialised team dealing with the rehabilitation primarily of birds of prey, but of other birds also. Gulls and falcons regularly injure migrant birds of prey and others are taken illegally and need help to get back to the wild.

The small but dedicated Invertebrate Section, is currently cataloguing Gibraltar’s largely unexplored invertebrate fauna.  Interests within the section include Molluscs, Isopods, Coleoptera (beetles), Lepidoptera (butterflies & moths) and Odonata (dragonflies & damselflies). The section is also very keen on identifying habitats that are of particular importance to invertebrates, particularly rarer species, with a view to making recommendations on their management and conservation.  

The Caves and Cliffs Section, composed of experienced and skilled climbers, provides a wide and varied supporting role, like rescuing birds from cliffs, seeking out rare plants, and cleaning inaccessible areas.  They are involved also in research into the climate of caves.

In 2015, GONHS worked in partnership with the Government of Gibraltar and UKOTCF to organise the Gibraltar Conference for conservation practitioners and the first meeting of UKOT/CD Environment Ministers.