Colonies are found where the food plant, Kidney Vetch grows on chalky soils. That includes Magog Down near Cambridge where they have recently reappeared.
The Small Blue has only one main brood per year, with the adults on the wing from late May to early July.
External links to the Small Blue pages at:
British Butterflies
by Steven Cheshire .
UK Butterflies by Peter Eeles
Search menu at
Cockayne database for forms and aberrations
27 May 2012. Totternhoe Quarry. 9 Small Blues.
19 June 2012. Totternhoe Quarry. 52 Small Blues.
9 June 2013. Totternhoe Quarry, a dullish day. 7 Small Blues.
30 May 2025. Magog Down. 7 Small Blues.
31 May 2025. Magog Down. 6 Small Blues.
1 Apr 2013