Apart from its greater size and slightly falcate forewings the species can be separated from the other Wood Whites in Europe (Leptidea spp.) by the conspicuous gliding flight displayed by the males. Fenton’s Wood White can be seen on damp, grassy vegetation at the sunny edges of woods, in grassy woodland clearings and on regenerating woodland on grassland. They occur almost exclusively in oak forest and mixed deciduous woods. This butterfly has two generations a year and hibernates in the pupal stage. The larvae feed on Peas, in Europe on Lathyrus niger or Lathyrus vernus with ova being laid almost exclusively on the plants in the shade. In Transylvania, an important larval food plant is the endemic Lathyrus hallersteinii. Habitats: broad-leaved deciduous forests (40%), mesophile grasslands (15%), humid grasslands and tall herb communities (10%), coniferous woodland (10%), mixed woodland (10%).
- Gascoigne-Pees M, Trew D, Pateman J, Verovnik R (2008) The distribution, life cycle, ecology and present status of Leptidea morsei (Fenton 1882) in Slovenia with additional observations from Romania (Lepidoptera: Pieridae). Nachrichten des entomologischen Vereins Apollo, Neue Folge 29: 113-121.
- Höttinger H (2004) Verbreitung, Ökologie, Gefährdung und Schutz des Senf-Weißlings Leptidea morsei (Fenton, 1881) in Österreich, insbesondere im Burgenland (Lepidoptera, Pieridae). Joannea Zoologie 6: 187-206.
- Lorković Z (1993) Ecological association of Leptidea morsei major Grund 1905 (Lepidoptera, Pieridae) with the oak forest Lathyreto-quercetum petraeae HR-T 1957 in Croatia. Periodicum Biologorum 95: 455-457.
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