Dryas iulia moderata  (Riley, 1926)

ON : * Colaenis julia modesta Riley, 1926
OD : Entomologist 59(9):241-242.
TL : 'Honduras'. (ZMHB)
Distribution : P.Thailand, Langkawi, W.Malaysia,
Texas, Mexico, C.America, Ecuador.
Dryas iulia moderata map


Colaenis iulia delila f.moderata Stichel, 1908 : in Genera Insectorum 63:12 (note 3). TL. Chimbo, Honduras.

Records taken from Literature

Dryas iulia ; Küppers,2007 : 325, figs.Abb.1-5. (Phang Nga: Khao Lak; Nakhon Si Thammarat: Khao Luang; Chumphon: Lang Suan)
Dryas iulia ssp. ; Les Day,2011-2022 : Samui Butterflies, figs.♂,♂(Un),♀. (Koh Samui; Koh Phangan) (accessed: 2021.11.28)
Dryas iulia ; Ek-Amnuay,2012 : 374, pl.160 figs.N203,♂,♂(Un),♀,♀(Un). (Phuket; Nakhon Si Thammarat; Surat Thani; Chumphon)
Dryas iulia modesta ; Burg et al.,2014 : 1-6, figs.♂,♂(Un). (Phuket; Phi Phi Don; Samui; Nakhon Si Thammarat; Phang-Nga; Chumphon)
Dryas iulia ; Kimura et al.,2016 : 43, figs.♂,♂(Un). (Phuket)
Dryas iulia julia ; Küppers & Janikorn,2020 : 26-27, figs.Abb.N-074,158-165. (Phang Nga)

Specimens Examined

Surat Thani (Koh Phangan dist.) : 2♂ (photo by A.Giudici).
JanFebMarAprMayJun JulAugSepOctNovDec

Nakhon Si Thammarat : 1♂ (photo).
JanFebMarAprMayJun JulAugSepOctNovDec

Yala : 1♂ (photo by S.Atdhabhan).
JanFebMarAprMayJun JulAugSepOctNovDec


The butterfly is not rare in montane forests at low elevations (Alt. 30 - 300m). Both sexes visit flowers and males occasionally come to the banks of streams and puddles to suck water.
According to Burg et al,2014, this species was introduced to Thailand by the Phuket Butterfly Garden. It has rapidly expanded its distribution and is now found as far as the Malay Peninsula.


Stichel, H.,1908 : Lepidoptera Rhopalocera. Fam. Nymphalidae. Subfam. Dioninae Genera Insectorum
63:1-38, pl.1-3.

Küppers, P.V.,2007 : Ist Dryas iulia (Fabricius, 1775) mittlerweile ein fester Bestandteil der thailandischen Lepidopterenfauna ? (Lepidoptera, Nymphalidae)
Atalanta 38(3/4):325-328.

Burg, N.A., Pradhan, A., Gonzalez, R.M., Morban, E.Z., Zhen, E.W., Sakchoowong, W. & Lohman, D.J.,2014 :
Inferring the Provenance of an Alien Species with DNA Barcodes: The Neotropical Butterfly Dryas iulia in Thailand
Plos one 9: ussye 8, e104076.

Dryas iulia moderata Dryas iulia moderata
♂, Surat Thani, Thailand. (photo by A.Giudici) ♂, Surat Thani, Thailand. (photo by A.Giudici)
Dryas iulia moderata Dryas iulia moderata
♂, Nakhon Si Thammarat, Thailand.
Dryas iulia moderata Dryas iulia moderata
♂, Yala, Thailand. (photo by S.Atdhabhan)

2019.09.30 - 2023.09.30.

A Check list of Butterflies in Indo-China, Chiefly from THAILAND, LAOS & VIETNAM. Copyright © 1996- Y.Inayoshi.