Variety at winter bird tables
Glue, D.E. (2006)
Bird Populations 7: 212-215
The BTO’s Garden Bird Feeding Survey (GBFS) was conceived in the late 1960s, to assess the range of birds capitalizing on supplementary foods in gardens and to examine their food preferences. Since the winter of 1970/71,observers have been charting the weekly peak counts of feeding birds countrywide. Today, the survey also provides a check on changes in status of garden species. Bird food and feeders have changed markedly and currently, up to 60,000 tonnes of peanuts and wild bird seed are provided annually in the UK, a bird care facility worth £150–180 millions.
One bird, twelve journeys, 60 000 miles and invaluable scientific data: PJ the Cuckoo has left an incredible legacy.
BTO Data Reports
Our reports provide rigorous scientific information to inform Environmental Impact Assessments in the UK.