The elm zigzag Sawfly boasts a zigzag pattern of egg laying, making its mark on elm leaves. This unique behavior not only distinguishes it, but aids in safeguarding its offspring from predators. In nature's balancing act, the elm zigzag Sawfly helps in controlling elm growth, providing spaces for other organisms to thrive. Yet, its unchecked proliferation can lead to defoliation, impacting tree health. These intricacies underscore the elm zigzag Sawfly's role in shaping its environment.

Arge humeralis, the poison ivy sawfly, is a species of argid sawfly in the family Argidae. .Larvae feed on poison ivy, Toxicodendron radicans.

Arge pagana can reach a length of about 1 cm. Wings and veins on the wings are black, often with blue metallic sheen. Pronotum and legs are also black. Its most conspicuous feature is a large rounded yellow abdomen. It has a black head and thorax and the legs are largely black. Larvae reach about 25 mm and are pale green with black dots and a yellow head.

The adults of Arge cyanocrocea grow up to 7–8 millimetres (0.28–0.31 in) long. As all sawflies, this species is related to wasps and not to flies, but lacks the typical wasp waist. Its head and thorax are black, while the abdomen is yellowish orange. Legs are reddish, with small black rings. The wings show a characteristic wide transversal dark band and gray apex. Arge cyanocrocea is rather similar to Arge pagana, that shows black wings.

The azalea argid sawfly is distinguished by its striking, metallic blue or green sheen and a set of black and yellowish-white markings that enhance its visual allure. This species is particularly noted for the saw-like ovipositor of the females, used to insert eggs into plant host tissue, which often includes various species of roses. Adaptive in diet, the larvae feed on the foliage of their host plants, while the adults are known to partake in the nectar of flowers, showcasing their role in pollination.