The Biological Records Centre, which supports more than 80 wildlife recording societies and schemes, is celebrating its 50th anniversary.
Its data, submitted by volunteers, is used by scientists, such as monitoring the spread of invasive species.
It has also helped researchers gain insight into ecological concerns, such as the demise of pollinating insects.
To mark the centre's half-century, biologists have gathered for a special event at the University of Bath.
"The Biological Records Centre [BRC] has been supporting, in many different ways, volunteers making records of nature and wildlife in Britain over the past half-century," said Michael Pocock, an ecologist based at the BRC.
"There are a whole load of recording schemes and societies, each of which are run by volunteer experts who will in turn inspire, equip and encourage people to go out and record a particular group that they are interested in.
"In a sense, it is the BRC's role to make that process as efficient and successful as possible."
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