Distribution maps

The following maps are taken from the East Glamorgan Bird Atlas, produced by the Glamorgan Bird Club and the BTO,following the latest survey (2007 - 11). The rapid decline in Swift numbers is obvious, with Swifts nesting in 98 tetrads in the 1980s survey compared with only 20 today.

Status 1984 to 1989

Status 2008 to 2011

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