Seq # 460020010

Thecla betulae (Linnaeus, 1758) Species

Last modified: March 15, 2022, 9:46 a.m.

A rare and local species throughout Belgium.


Family: Lycaenidae > Subfamily: Theclinae > Tribus: Theclini > Genus: Thecla > Species: Thecla betulae
Vernacular names
Sleedoornpage (NL), Brown Hairstreak (EN), Thècle du bouleau (FR), Nierenfleck-Zipfelfalter (DE)
First mention in Belgium
De Sélys-Longchamps E. 1837. Catalogue des Lépidoptères ou Papillons de la Belgique, précédé du tableau des Libellulines de ce pays. — — : 1–29. On page 16 (as Polyommatus Betula). view page




Museum specimens

Specimens in nature


Flight periods

The adults fly in one generation a year; from late July till mid September.

Observed on

Host plant (species):
Prunus spinosa
Host plant (genera):

The larva lives mainly on Prunus spinosa. Eggs are laid singly, but sometimes found in twos and threes, on the bark of Prunus twigs, nearly always at the base of a spine or the junction of one- and two-year old twigs. Hibernates as an egg. Pupates in a crevice, on a dead leaf or at the base of grass.

No pictures yet!