They have fed on the aphids/greenfly that your trees have been infested with, they are the good guys (ladybirds) trying to help you out

Gg

Ladybirds are the gardeners friend, I'm picking up any I find n taking them back to doodle towers xxxx

I have never thought of collecting them lol

Gg

Yup, I keep a wee tub with holes in in my handbag for rehoming them lol x

The aphids that the ladybirds have come to feed on could have caused your trees to die back. They are sap-sucking insects and do spread virus' and diseases. Maybe leave a clump of nettles in a corner of the garden for the ladybirds to breed on - then they will be on hand to control your aphids - before they kill anything else!!

thanks very much,great help.

thanks.Great help.