Brown hairstreak
Thecla betulae
Gossamer-winged butterflies
(Lycaenidae)
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The upper surface is dark brown, without markings for the ♂, the ♀ has an orange marking on the larger front wing. The under surface is dark orange with a white-edged darker coloured band. Body and legs are light grey. A small tail on the rear wing. ⇔ wsp. 28-33 mm LA: ≈ The SATYRIUM ILICIS (Ilex hairstreak) has an intermittent white band on it's under surface. ≈ The SATYRIUM SPINI (Blue spot hairstreak) has only one white stripe on its under surface.
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Family(24)
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Wingspan
Profile
Colour
Eye-spot
Feeler
CP Size
CP Skin
CP Colour
CP Pattern
Type
< 40 mm
Open
Knob
15-40 mm
Hairy
Lines
Day
2 LookAlikes (LA):
Blue spot hairstreak
Ilex hairstreak
Brown hairstreak
Sleedoornpage
Nierenfleck-Zipfelfalter
Thècle du bouleau
Tecla della betulla
Thecla betulae [L.]
Thecla betulae [L.]
Зефир берёзовый
Thecla betulae [L.]
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