Spiny katydid (Sasima sp.), juvenile ♀ Spiny helmeted katydid (Sasima sp.) from the rainforest of southern New Guinea. The bristly armaments on this juvenile specimen serve not only to deter predators, but also to disguise the insect in the mossy forest understory. Helmet katydids (Phyllophorinae) comprise some of the world's largest species. Digul River, Papua, Indonesia (New Guinea).

Spiny katydid (Sasima sp.), juvenile ♀ Spiny helmeted katydid (Sasima sp.) from the rainforest of southern New Guinea. The bristly armaments on this juvenile specimen serve not only to deter predators, but also to disguise the insect in the mossy forest understory. Helmet katydids (Phyllophorinae) comprise some of the world's largest species. Digul River, Papua, Indonesia (New Guinea).