Woodland Trust

Nature's CalendarNature Detectives

Keep a look out in the tree tops for rooks first nest-building - record them on our survey!

Holly blue. Roy Battellholly blue

Celastrina argiolus

  • Shining, sky blue upperside wings with fine borders
     
  • The female has heavy dark borders to its forewings
     

Where found

Bushy, wooded habitat, often in woodland clearings and margins where its larvae feed on many plants, eg holly, bramble, gorse and ivy.

Common in Southern England, Wales and parts of Northern Ireland.
 

When to look forAdd the dates of when you first record this species

Usually end of April / June