Dark blue tiger

Dark blue tiger
Upperside
Underside
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Lepidoptera
Family:	Nymphalidae
Genus:	Tirumala
Species:	T. septentrionis
Binomial name
Tirumala septentrionis (Butler, 1874)

Tirumala septentrionis, the dark blue tiger, is a danaid butterfly found in the Indian subcontinent and Southeast Asia.

Closely resembles Tirumala limniace, Cramer, but is always sufficiently distinct to be easily recognized, even on the wing. From T. limniace it differs on the upperside in the ground colour being darker and the semihyaline markings narrower, more distinct, and of a bluer tint, In the forewing, in interspace 1 the two streaks are narrower, never coalescent, the upper one forming an oval detached spot; the short streaks above vein 5 are outwardly never truncate, always acute. In the hindwing the two streaks if the discoidal cell united at base are wide apart at their apices, the lower one never formed into a hook. On the underside this species is generally darker, the apex of the forewing and the whole of the ground colour of the hindwing not being of the conspicuous golden brown that they are in T. limniace.

Wingspan 80–115 mm.

The Himalayas from Simla to Sikhim, into Assam, Myanmar, and Southeast Asia; Orissa; West Bengal, southern India, the Western Ghats and Nilgiris; Sri Lanka.

This species is one of the predominant species (78%) during the migratory season in southern India during which many species migrate. Both males and females appear to migrate in equal numbers.

Caterpillar is similar to that of T. limniace (see Journal of the Bombay Natural History Society x, 1896, p. 240). It is said by MacKinnon and de Niceville to feed on Vallaris dichotoma (Jour. Bomb. N. H. Soc. xi, 1807, p. 212). Other species include Cosmostigma racemosa,Heterostemma brownii and Cocculus species.

Egg

Caterpillar

Pupa

Adult

On Crotalaria retusa (rattleweed) at Talakona forest, in Chittoor district of Andhra Pradesh, India

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