Leptidea juvernica | Bánóg choille dhuaithne
Ireland: Least Concern - assessed as the Leptidea reali species complex (Regan et al., 2010)
Europe: Least Concern - assessed as the Leptidea reali species complex (van Swaay et al., 2010)
Climate risk category: Potential Climate Change Risk; present distribution in Europe can be explained by climate to only a limited extent - assessed as the Leptidea reali species complex (Settele et al., 2008).
The Cryptic Wood White is not afforded legal protection in Ireland.
Nelson et al. (2001) found that there are two species of Wood White in Ireland that cannot be reliably differentiated in the field. Genetic research by Dinca et al. (2011; 2013) found that the Wood White Leptidea sinapis, found throughout Britain and continental Europe, is confined to the Burren and similar areas in Clare and Galway. In contrast, the Cryptic Wood White Leptidea juvernica can be found throughout Ireland and continental Europe, but is absent from Britain.
Key identification features include:
- Small size, wingspan: 40-42 mm
only be reliably differentiated from the Wood White by
dissection of their genitalia or genetic markers, therefore it is
recommended to simply record Leptidea sp. in the field
- 'Delicate' appearance with weak fluttering flight
- Rounded wings with no bold markings
- White with grey wing tips above and grey to light green beneath
Generalist on grassy forest clearings, roadside verges, coastal and scrub areas. Found across Ireland, but given the difficulty in differentiating Cryptic Wood Whites from Wood Whites, it is currently unknown to what extent both species co-occur within the range of the Wood White in the Burren and similar areas in Clare and Galway. Adults fly in sunny conditions with a characteristic slow, flapping flight close to the ground, especially among tall herbs and in scrub. The males patrol territories, while the females spend much of their time on flowerheads, or searching for oviposition sites. In dull weather adults may be found resting on flowerheads (Bond & Gittings, 2008).
Univoltine: from April to July.
Eggs are laid directly onto the foodplant, usually beneath a leaflet or bract. The larva feeds externally on the foliage, pupating around September. The pupa, which overwinters, is attached to an upright stem of a plant other than one of the foodplants (Bond & Gittings, 2008).
The larva primarily feed on Bird's-foot Trefoil (Lotus corniculatus) and Meadow Vetchling (Lathyrus pratensis).
Generalist, adults feed primarily on Bird's-foot Trefoil (Lotus corniculatus), but Bramble (Rubus fruticosus), Bugle (Ajuga reptans), Buttercups (Ranunculus spp.), Greater Stitchwort (Stellaria holostea), Ragged Robin (Lychnis flos-cuculi), Red Clover (Trifolium pratense) and Vetches (Vicia spp.) are also used.
Records submitted to Data Centre in 2020
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Bond, K.G.M. and Gittings, T. 2008. Database of Irish Lepidoptera. 1 - Macrohabitats, microsites and traits of Noctuidae and butterflies. Irish Wildlife Manuals, No. 35. National Parks and Wildlife Service, Department of the Environment, Heritage and Local Government, Dublin, Ireland.
Dinca, V., Wiklund, C., Lukhtanov, V.A., Kodandaramaiah, U., Norén, K., Dapporto, L., Wahlberg, N., Vila, R. and Friberg, M. 2013. Reproductive isolation and patterns of genetic differentiation in a cryptic butterfly species complex. Journal of evolutionary biology, 26(10): 2095-2106.
Dinca, V., Lukhtanov, V. A., Talavera, G., & Vila, R. 2011. Unexpected layers of cryptic diversity in wood white Leptidea butterflies. Nature communications, 2: 324.
Nelson, B., Hughes, M., Nash, R., & Warren, M. 2001. Leptidea reali Reissinger 1989 (Lep.: Pieridae): a butterfly new to Britain and Ireland. Entomologist's Record and Journal of Variation 113(3): 97-101.
Regan, E.C., Nelson, B., Aldwell, B., Bertrand, C., Bond, K., Harding, J., Nash, D., Nixon, D. and Wilson, C.J. 2010. Ireland Red List No. 4 – Butterflies. National Parks and Wildlife Service, Department of the Environment, Heritage and Local Government, Ireland.
Settele, J., Kudrna, O., Harpke, A., Kühn, I., Van Swaay, C., Verovnik, R., Warren, M.S., Wiemers, M., Hanspach, J., Hickler, T. and Kühn, E. 2008. Climatic risk atlas of European butterflies. Sofia-Moscow: Pensoft.
Van Swaay, C., Cuttelod, A., Collins, S., Maes, D., López Munguira, M., Šašic, M., Settele, J., Verovnik, R., Verstrael, T., Warren, M., Wiemers, M. and Wynhof, I. 2010. European Red List of Butterflies. Luxembourg: Publications Office of the European Union.