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Dacalana cotys

Dacalana cotys, the white-banded royal is a species of blue butterfly (Lycaenidae) found in South East Asia.

Range
The butterfly occurs in India from Sikkim to Arunachal Pradesh. and Thailand. ==Taxonomy==
Taxonomy
The butterfly was previously classified as Pratapa cotys, and Camana cotys. ==Status==
Status
Not common as per Wynter-Blyth. Not rare as per Evans. ==Description==
Description
The butterfly has a wingspan of 33 to 37 mm. The upperside of the male is a bright azure blue with a black border at the apex ranging from 0.5 to 5 mm at the apex. On the hindwing is a mid-costal white patch. The male has a brand on the upperside of the forewing. The female is paler with a prominent white patch at the end cell of the forewing. On the underside, the butterfly has a white band on a pale-brown background which broadens towards the costa and dorsum. There is a lot of seasonal variation in the band width. ==Habit and habitat==
Habit and habitat
It is mostly seen in wooded slopes of Himalaya. They are confined to forested area, often in the upper canopy. Males are often seen mud-puddling. ==See also==
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