The Branch area includes Dumfries & Galloway, Ayrshire, Greater Glasgow, Stirlingshire, Argyll, the Argyll islands, Dunbartonshire & Loch Lomond. This includes Scotland's first National Park: Loch Lomond & the Trossachs National Park. These regions include a diverse range of landscapes providing a range of habitats from the fertile central lowlands and coastal parts of Ayrshire/Dumfries & Galloway to the moorland of more inland areas of these counties and to the rugged mountain scenery of the southern highlands and Argyll and to the unique scenery and habitats of the Argyll islands.

If you live in the region and are a member of Butterfly Conservation you automatically become a member of the Glasgow & SW Scotland Branch.