The European Starling (Sturnus Vulgaris) is officially on the UK Red List of conservation concern. Despite still being a common sight, their UK breeding population has declined by roughly 57%–85% since the 1960s, leading to their classification as a species of "high conservation concern".  BTO.org +2

Key Reasons for Status:

Misconception of Abundance

While large, dramatic winter murmurations (flocks) can make starlings seem abundant, the long-term, sharp reduction in their breeding numbers warrants this high-level protection status. They are often still seen in large numbers because of incoming birds from Europe and congregating roosts, masking the severe decline in local, breeding, as noted by the BTO.