© DHardiman 2005

Habitat:   The Wood White is widespread especially along hedgerows, woodland margins and scrub.  It is plentiful in the Burren and is also notably found along railway cuttings.  
It has one brood in the northern part of Ireland but two broods have been reported for the Burren.

Flight time:   Mid-May to end of June
                            Mid-July to mid-August

Larval Food Plants:  
                                  Bird's-foot-trefoil  Lotus corniculatus
                                  Meadow Vetchling  Lathyrus pratensis
                                 Vetches   Vicia spp
Hibernation:   Overwinters as a pupa
 

The adult has a characteristic weak flight, often less than a meter from the ground.  In a light breeze it has difficulty making progress.  At rest, the wings are folded over and held upright above the body.  Recent work suggests that the Wood White in Ireland consists of two species Leptidea sinapis and L. reali

  Life Cycle of  the Wood White

Ovum:
 Single eggs are usually found on the underside of the food plant from mid-May to the end of June.  
They are spindle-shaped and initially a creamy-white colour, changing in time to light yellow.     
The eggs hatch within three weeks. 

Wood  White Ovum                     © DHardiman 2005

Wood  White Ovum  on  Meadow Vetchling. © DHardiman 2002

Larva:
Larvae may be found in late June and July (also between late August and September if there is a  
second brood). This larval stage can last between one and two months.  
When fully grown, it is almost cylindrical in shape and bright green in colour with a darker green 
mediodorsal  stripe and a spiracular yellow stripe.

Pupa:
In August/September pupation takes place in dense vegetation when the mature larva spins a silk pad 
on the plant stem from which the pupa is suspended by its cremasteral hooks and silken girdle.
It overwinters in this pupal stage. 

Adult:
The adult emerges the following May.