A bit of a puzzle

A bit of a puzzle

Observation - A bit of a puzzle - UK and Ireland. Description: A Salix (not Blackthorn as originally entered!) with numerous Cuckoo spit (Froghopper) visitors. B

A Salix (not Blackthorn as originally entered!) with numerous "Cuckoo spit" (Froghopper) visitors. Below one of these was this unusual orange mass: soft and moist to the touch. Can anyone suggest a cause? I wonder if it is semi-set sap?
The white flecks are Salix seeds, by the bye.