Which Butterfly?

Jahanpanah Forest was teeming with butterflies this weekend. Cabbage Whites, Grass Yellows, and Common Tiger's swarming all over the oleander's and other seasonal, wild flowers.

One curious sight was this strange looking caterpillar on a cactus plant, making a rather feeble attempt at mimicking the thorns. What could this be? Which butterfly or moth finds it worthwhile to seek food a cactus plant?

No answers so far...

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Related sites -

• Butterfly Safari
• Follow The Butterfly Trail