Start making your mud pies now
steephill Posts: 2,643
https://www.theguardian.com/environment/2022/may/05/mud-water-to-help-nesting-migrating-birds-during-uk-heatwave-rspb-aoe Certainly around here it is bone dry and the ground is rock hard. We don't have house martins or swifts locally but all the other birds appreciate the water as do bees.
Fortunately the recent weather has been ideal for collecting mud, as the swallows have appeared earlier than usual.
I live in west central Scotland - not where that photo is...