Graphium is the genus name for Swordtail butterflies.
   Graphium euruos are seen along the Himalayas west from northern Pakistan into India, including Jammu & Kashmir, Himachal Pradesh, Garhwal and Kumaon, Sikkim, Assam, Manipur, Nepal, northern Myanmar extending into south western and central China. Also, Taiwan.
   They are generally found in open places in wooded terrain between 3,000 and 8,000 feet (910 and 2,440 m) in the Himalayas.
   They also inhabit certain small localities and are aways to be found there.
   The best time to find them is usually during the day, especially late morning or early afternoon, when the adults are most active.
   Males are rarely away from their favorite spots, while the females wander abroad in search of their host plants, the Laurels.
   Males generally fly up high, often around a selected tree, where they can be seen settling now and then well out of reach.

   Occasionally, they descend close to the ground where they can be netted.

   Females, being less lively, fly closer to the ground, and are often found settling on their host plants.

   All the bands on the ventral surfaces are narrowed, being only blackish stripes on a pale yellow transparent ground, the anal area of the hindwing is more strongly colored, bearing a honey yellow anal spot which is somewhat constricted in the middle.

   Behind this spot there is a blue centered dot, which represents the anal ocellus.

   This species is single brooded.

   They regularly emerge in Himachal Pradesh area in mid April and stays on the wing till mid May.

   They emerge slightly earlier east of Himachal till in Assam the butterflies appear as early as January.

   They prefer warm and sunny days for flying and feeding, and may be inactive in rainy or cold weather.

   They are not poisonous, but have special glands that secrete foul odors and chemicals.

   Potential predators include birds, spiders, monkeys,  and mantis.