Polyommatinae is a sub-family of the butterfly family Lycaenidae that are often commonly referred to as Blues. 

Common Blue (male). Titchwell, UK September 2020
Common Blue (female). Cambridge, UK July 2025
Small Blue. Trumpington Meadows, Cambridge July 2025
Small Blue underwing. Trumpington Meadows, Cambridge July 2025
Holly Blue. Fleam Dyke, Cambridgeshire July 2025
Chalk Hill Blue. Fleam Dyke, Cambridgeshire July 2025
Brown Argus. Cambridge, UK July 2025

Peacocks, Checkerspots, Anglewings  (Nymphalinae)