Swifts... their screaming calls are the sound of summer, yet these aerial acrobats are in trouble. Their UK population has declined by almost 60% over the last two decades. This week we meet John Stimpson, the man on a mission to reverse the decline of this much-loved bird. Does garden size matter when it comes to providing food for pollinating insects such as bees and butterflies? New research from the RHS along with the Universities of Bristol, Cardiff and Northumbria shows that even tiny gardens have a valuable role to play – but it all depends on the planting. The paper also produced interesting findings on how certain types of plants and flower shapes were particularly useful to pollinators, as scientist Nick Tew explains. Plus RHS gardening advisor Nikki Barker shares tips on how to garden successfully on clay soil. Useful links RHS wildlife gardening hub The man who built homes for 60,000 swifts (Guardian article) University of Bristol press release (pollinator research) RHS advice on gardening on clay soil