What leads goldfinches British gardens?
November 4, 2015 at 00:24 GMT last updated
The British Trust for Ornithology please to help volunteers to find them, which is behind a huge boost in the population goldfinches in the UK.
The number of birds has increased by almost 80% in the last twenty years, and the researchers concluded that the public join in a national survey to find out what helps them thrive in our gardens.
To participate in the survey Volunteers should monitor their garden for two minutes and count how many goldfinches come and what, if any, then feed them.
Video of Victoria Gill made
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