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Yorkshire Wildlife Trust Archive Subsérie
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Common Bird Census

The Common Bird Census was introduced in 1962 as the first scheme by the British Trust for Ornithology (BTO) to monitor population trends across common breeding bird species in the UK. Initially it sought to provide vital information on British fa...

Breeding Bird Surveys

The Breeding Birds Survey was launched nationally in 1994, following two years of development and pilot schemes. It is designed to overcome limitations of the Common Birds Census by improving the geographical representation of species.

Drainage and Wetland Preservation

Papers concerning the Trust's work to preserve the traditional haymeadows and wetland habitats along the ings of the River Derwent, at risk from drainage proposals. Records include early reports on the significance of the Lower Derwent Valley...

York Otter Action Team Papers

Including papers relating to the potential development of an otter sightings database, as well as lists of sightings between the 1980s and 2000s.Further uncatalogued material was deposited during 2016, comprising two boxes of regional survey files...

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